SOS Flashlight: Advanced Morse Code Tool

Turn your phone into a Morse code device, to transmit emergency messages.

AppID:	org.wbftw.weil.sos_flashlight
Author:	Weil Jimmer
License:	GPL-3.0-only
Donation:
InRepoSince:	2025-08-04
LastRepoUpdate:	2025-09-04
LastAppUpdate:	2025-09-04
LastVersion:	1.0.3
Categories:	Office
APK source:	Github
Google Play:	Check if it's there

SOS Flashlight App transforms your smartphone into a powerful Morse code signaling device, capable of transmitting emergency messages or custom text through multiple channels simultaneously.

Features

Signal Transmission Methods
- Flashlight: Utilizes your device's camera led flashlight to transmit visual signals.
- Vibration: Sends tactile signals through device vibration.
- Audio: Generates clear audio tones at 700Hz frequency.
- Screen Light: Maximizes screen brightness to create visual signals in darkness.
Core Capabilities
- Background Service: Continue signaling even when the app is minimized or screen is locked.
- Message Customization: Send any custom message in Morse code.
- Adjustable Speed: Choose from slow, medium, fast, or custom transmission speeds.
- Morse Code Decoder: Convert received Morse code into readable text.
- User Preferences: Independently toggle each signaling method based on your needs.

Usage

Emergency SOS: Press the SOS button to immediately begin transmitting the international SOS signal (... --- ...).
Custom Message: Enter your text in the input field and press "Send" to convert and transmit.
Decoder: Navigate to the decoder screen to translate incoming Morse code signals.
Settings: Customize transmission speed and toggle different signaling methods.

Contribute

Contributions are welcome! Feel free to open issues or submit pull requests on our GitHub repo.

License

This project is licensed under the GNU General Public License (GPLv3) - see the LICENSE file for details.

Source

https://github.com/WeilJimmer/SOSFlashlightApp.git

WhatsNew:

# SOS Flashlight v1.0.3 (10003) - Minor Update

- Added: Screen Light color selection feature, now you can change the screen light color through the color palette.
- Fixed: Allow the use of longer time intervals to enable normal vibration for devices that cannot vibrate in extremely short periods of time.

Download Website Source Issues ChangeLog

While you can download the APKs here directly, you should preferably use an F-Droid client so the app stays up-to-date on your device. Some clients have this repo enabled by default, e.g. Neo Store, Droid-ify, or, of course, the IzzyOnDroid client by Sunil. With others (like the official client) you'll have to add this repo manually (see the hint on top of the package list for how to do that).

Packages

Version 1.0.3 (2025-09-04)

Android Versions:

Target: 16.0
MinVer: 6.0
ABIs: arm64-v8a, armeabi-v7a, x86, x86_64

Permissions:

Malware-Check:Passed

51 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Android Jetpack Annotations (Utility)
library that contains the annotations for Android Jetpack.
Arch (Utility)
helper for other arch dependencies, including JUnit test rules that can be used with LiveData.
AppCompat (Utility)
support newer Android features on older Android versions.
Autofill (Utility)
improve autofill accuracy via extending hints.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Android Support Library collections (Utility)
standalone efficient collections.
Jetpack Compose (Development Framework)
a framework to define UIs programmatically with composable functions that describe its shape and data dependencies.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
AndroidX Cursor Adapter (Utility)
static library support version of the framework's CursorAdapter.
Android Support Library Custom View (UI Component)
a module to implement custom views. Part of the Android Support Library.
Documentfile (UI Component)
a library to view a file document.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Dynamicanimation (UI Component)
create smooth animations with a physics-based animation API.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Androidx Graphics (Utility)
leverages graphics facilities across multiple Android platform releases.
AndroidX Inspection (Utility)
Interpolator (UI Component)
AndroidX library to use animation interpolators on older platforms.
androidx.legacy (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
AndroidX Local Broadcast Manager (Utility)
an application-wide event bus and embraces layer violations in your app: any component may listen events from any other.
Navigation (Utility)
a framework for navigating between 'destinations' within an Android application that provides a consistent API whether destinations are implemented as Fragments, Activities, or other components.
Print (Utility)
a library to print photos, docs, and other graphics and images.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
ResourceInspection (Development Aid)
AndroidX library to surface the attributes of custom views in Android Studio’s Live Layout Inspector.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Slidingpanelayout (UI Component)
AndroidX library to implement a sliding pane UI pattern.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
Tracing (Utility)
AndroidX library to write trace events to the system trace buffer.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
Colorpicker Compose (UI Component)
Jetpack Compose color picker library for getting colors from any images by tapping on the desired color.
Google Material Design (Utility)
library to help with material design guidelines.
Google Core Libraries for Java 6+ (Utility)
a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.
Error Prone (Utility)
a static analysis tool for Java that catches common programming mistakes at compile-time.
Kotlin (Utility)
The Kotlin Programming Language
kotlinx.coroutines (Utility)
library support for Kotlin coroutines.
Kotlin serialization (Utility)
Kotlin cross-platform / multi-format serialization.
IntelliJ IDEA (Utility)
development helper: integration for the IntelliJ IDEA IDE.
JSpecify (Development Aid)
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

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Version 1.0.2 (2025-08-16)

Android Versions:

Target: 16.0
MinVer: 6.0

Permissions:

Malware-Check:Passed

46 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Android Jetpack Annotations (Utility)
library that contains the annotations for Android Jetpack.
Arch (Utility)
helper for other arch dependencies, including JUnit test rules that can be used with LiveData.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Android Support Library collections (Utility)
standalone efficient collections.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
AndroidX Cursor Adapter (Utility)
static library support version of the framework's CursorAdapter.
Android Support Library Custom View (UI Component)
a module to implement custom views. Part of the Android Support Library.
Documentfile (UI Component)
a library to view a file document.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Dynamicanimation (UI Component)
create smooth animations with a physics-based animation API.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Interpolator (UI Component)
AndroidX library to use animation interpolators on older platforms.
androidx.legacy (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
AndroidX Local Broadcast Manager (Utility)
an application-wide event bus and embraces layer violations in your app: any component may listen events from any other.
Navigation (Utility)
a framework for navigating between 'destinations' within an Android application that provides a consistent API whether destinations are implemented as Fragments, Activities, or other components.
Print (Utility)
a library to print photos, docs, and other graphics and images.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
ResourceInspection (Development Aid)
AndroidX library to surface the attributes of custom views in Android Studio’s Live Layout Inspector.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Slidingpanelayout (UI Component)
AndroidX library to implement a sliding pane UI pattern.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
Tracing (Utility)
AndroidX library to write trace events to the system trace buffer.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
Google Material Design (Utility)
library to help with material design guidelines.
Google Core Libraries for Java 6+ (Utility)
a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.
Error Prone (Utility)
a static analysis tool for Java that catches common programming mistakes at compile-time.
Kotlin (Utility)
The Kotlin Programming Language
kotlinx.coroutines (Utility)
library support for Kotlin coroutines.
Kotlin serialization (Utility)
Kotlin cross-platform / multi-format serialization.
IntelliJ IDEA (Utility)
development helper: integration for the IntelliJ IDEA IDE.
JSpecify (Development Aid)
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Payment Modules:

None found
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Ads & Analytics:

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Version 1.0.1 (2025-08-04)

Android Versions:

Target: 16.0
MinVer: 6.0

Permissions:

Malware-Check:Passed

46 Libraries detected:

Libraries:

Android Support v4 (Development Framework)
The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see Understanding the Android Support Library.
AndroidX Activity (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Android Jetpack Annotations (Utility)
library that contains the annotations for Android Jetpack.
Arch (Utility)
helper for other arch dependencies, including JUnit test rules that can be used with LiveData.
AppCompat (Utility)
support newer Android features on older Android versions.
Cardview (UI Component)
AndroidX library to implement the Material Design card pattern with round corners and drop shadows.
Android Support Library collections (Utility)
standalone efficient collections.
Concurrent (Utility)
AndroidX library to help move tasks off the main thread with coroutines and take advantage of ListenableFuture.
Constraint Layout Library (Utility)
library to reduce the number of nested views needed.
Coordinatorlayout (UI Component)
AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
Androidx Core (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
AndroidX Cursor Adapter (Utility)
static library support version of the framework's CursorAdapter.
Android Support Library Custom View (UI Component)
a module to implement custom views. Part of the Android Support Library.
Documentfile (UI Component)
a library to view a file document.
Drawerlayout (UI Component)
AndroidX library to implement a Material Design drawer widget.
Dynamicanimation (UI Component)
create smooth animations with a physics-based animation API.
Android Emoji2 Compat (UI Component)
core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
AndroidX Fragment (UI Component)
AndroidX library to encapsulate part of the user interface or behavior into reusable components.
Interpolator (UI Component)
AndroidX library to use animation interpolators on older platforms.
androidx.legacy (Utility)
a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
Lifecycle (Utility)
perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
Loader (Utility)
library to load data for your UI that survives configuration changes.
AndroidX Local Broadcast Manager (Utility)
an application-wide event bus and embraces layer violations in your app: any component may listen events from any other.
Navigation (Utility)
a framework for navigating between 'destinations' within an Android application that provides a consistent API whether destinations are implemented as Fragments, Activities, or other components.
Print (Utility)
a library to print photos, docs, and other graphics and images.
ProfileInstaller (Utility)
AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
ResourceInspection (Development Aid)
AndroidX library to surface the attributes of custom views in Android Studio’s Live Layout Inspector.
Recyclerview (Utility)
display large sets of data in your UI while minimizing memory usage.
Android Activity Saved State (Utility)
provides the base Activity subclass and the relevant hooks to build a composable structure on top.
Slidingpanelayout (UI Component)
AndroidX library to implement a sliding pane UI pattern.
Startup (Utility)
AndroidX library to implement a straightforward, performant way to initialize components at app startup.
Tracing (Utility)
AndroidX library to write trace events to the system trace buffer.
Transition (UI Component)
animates motion in the UI with starting and ending layouts.
Vectordrawable (UI Component)
AndroidX library to render vector graphics.
Android Jetpack VersionedParcelable (Utility)
Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
Viewpager (UI Component)
AndroidX library to display Views or Fragments in a swipeable format.
AndroidX Widget ViewPager2 (UI Component)
replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
Jetpack WindowManager Library (Utility)
enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices.
Google Material Design (Utility)
library to help with material design guidelines.
Google Core Libraries for Java 6+ (Utility)
a set of core libraries that includes new collection types (such as multimap and multiset), immutable collections, a graph library, functional types, an in-memory cache, and APIs/utilities for concurrency, I/O, hashing, primitives, reflection, string processing, and much more.
Error Prone (Utility)
a static analysis tool for Java that catches common programming mistakes at compile-time.
Kotlin (Utility)
The Kotlin Programming Language
kotlinx.coroutines (Utility)
library support for Kotlin coroutines.
Kotlin serialization (Utility)
Kotlin cross-platform / multi-format serialization.
IntelliJ IDEA (Utility)
development helper: integration for the IntelliJ IDEA IDE.
JSpecify (Development Aid)
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Payment Modules:

None found
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Ads & Analytics:

None found
an artifact of fully-specified annotations to power static-analysis checks, beginning with nullness analysis.

Download (5.8 M)