# FlashDim Review: Android 13 Flashlight Dimming and SOS Controls > FlashDim is an open source Kotlin flashlight app for Android 13 and later that adds hardware-dependent brightness levels, SOS, Morse code, interval modes, and quick access controls. Its central limitation is equally important: full dimming works only on devices whose flashlight supports variable brightness. **cyb3rko/flashdim** — Modern flashlight app with dim functionality on Android 13+ - Repository: https://github.com/cyb3rko/flashdim - Stars: 1,476 · Forks: 71 - Language: Kotlin - License: Apache-2.0 - Published: 2026-10-16 · Updated: 2026-10-16 · Language: en - Canonical page: https://hysenlabs.com/projects/cyb3rko-flashdim ## Why FlashDim Exists for Android 13 Users FlashDim addresses a gap in the ordinary Android flashlight interface. FlashDim is a Kotlin Android application built around that capability. It is intended for people who need a softer flashlight, different output levels for different situations, or a light that can follow a timed pattern without relying on the stock control. The project is hardware dependent rather than universally compatible by software alone. The README places the requirement in an important note: full functionality is available only on devices that support flashlight dimming. That limitation affects the central promise of the app. A device running Android 13 may still expose a camera or torch feature without supporting the variable brightness levels needed by FlashDim. The audience is therefore narrower than the audience for a general flashlight utility. A user with an older phone, a device without a flashlight, or a flashlight whose brightness cannot be controlled will not receive the complete feature set. FlashDim is more relevant to owners of compatible Android 13 or later hardware who value local, ad-free flashlight controls. ## FlashDim Controls and Android Hardware Boundary The app exposes a main flashlight function with level-by-level dimming. The README also lists shortcut buttons for different brightness levels, so the interface is not limited to one maximum output. The specific implementation of the brightness adjustment is not documented in the README, and the repository layout alone does not establish whether FlashDim sends intensity values through a particular Android API or adapts them through device-specific handling. The README identifies the project as inspired by polodarb/Flashlight-Tiramisu and says its custom SeekBar uses code from massoudss/waveformSeekBar. Those references point to the interface design and control component, but they do not provide a technical guarantee about the underlying torch API. The reliable boundary is the README's statement that Android 13 introduced multiple flashlight brightness levels and that support remains limited by hardware. That makes device behavior the first adoption check. The presence of an Android flashlight feature does not prove that FlashDim can dim it. Users should consult the project's supported-device information before relying on the app for a particular phone. The README is also clearer about user-facing modes than about compatibility detection or fallback behavior when a device lacks variable brightness. ## SOS, Morse Code, and Interval Modes Beyond ordinary dimming, FlashDim includes several signal patterns. The README lists an SOS flash button, Morse code flash mode, and an Interval / BPM mode. These features make the application useful for situations where the flashlight needs to repeat a recognizable sequence rather than remain continuously lit. The README does not specify the exact timing values, whether Morse code can be entered freely, or whether BPM accepts arbitrary input. It also does not describe whether these patterns can use a reduced brightness level, whether they continue when the screen is locked, or whether Android background restrictions affect them. Those omissions matter for users who intend to use the app as a signaling tool. The combination of brightness shortcuts and patterned output is the project's main practical distinction from a basic on/off flashlight control. It is also a reason to test the modes on the intended device. A pattern that is adequate for ordinary use may not be suitable for signaling in a dark environment, and the README does not provide a timing specification. The app does not document a separate hardware or software mode for alerting. The feature list should therefore be read as available functionality, not as a promise that every pattern will operate identically across supported devices. ## Quick Settings, Volume Buttons, and Local Operation FlashDim provides a quick settings tile for fast access and supports toggling the flashlight by pressing both volume buttons. These are concrete convenience features for Android users who do not want to unlock the app for every use. The README does not document setup steps for the tile, key-mapping behavior, conflicts with other volume-button actions, or whether the shortcut can be disabled. The app states that it is private, contains no ads, and makes no internet connection. Based on that description, its advertised operating model is local flashlight control rather than an account-based service. The repository includes Kotlin source and an Android application module, but the README does not document a network configuration, telemetry system, or remote API. The absence of a documented network feature is not the same as a complete security audit, so users who require a verified privacy posture should inspect the source and permissions directly. The Material You design adapts colors to the device's system colors. That is an interface feature, not a torch capability, but it can make the app fit devices using dynamic color. The feature list does not document theme customization, accessibility behavior, localization, or screen-reader support, so those areas should be checked on the actual device. ## Download, First Use, and Build Information The README provides download paths through Google Play and F-Droid, as well as GitHub Releases. It does not provide a manual installation procedure, a Gradle command, or a documented configuration file for building the project. The application identifier shown in the README download links is com.cyb3rko.flashdim. The repository is not archived, and the last push was on 2026-08-28. Recent releases include v2.5.3 on 2026-08-28, v2.5.2 on 2026-08-27, and v2.5.0 on 2026-08-23. For a first real use, obtain the app from one of the documented download locations, install it on an Android 13 or later phone, and open the flashlight interface. The expected first choice is whether the flashlight can be dimmed level by level. If the device is supported, use the brightness control and test one of the preset levels in a dark environment. Then try the quick settings tile, both-volume-button shortcut, SOS, Morse code, and Interval / BPM modes. The README does not document how to import or verify release signatures, how to grant special permissions, or how to troubleshoot a device that is absent from the supported list. It also does not give a build command that can be copied from the documentation. ## When the Built-in Flashlight Is the Better Alternative The closest alternative is the flashlight control supplied by Android itself or by the phone manufacturer. Its practical difference is simplicity: the built-in control is designed around the device's exposed torch capability, while FlashDim adds level controls, signaling patterns, quick access, and the volume-button shortcut. On hardware with variable brightness, that difference can justify choosing FlashDim. On hardware without it, the system control may be the more predictable option because FlashDim's full functionality is explicitly limited by device support. The repository also names polodarb/Flashlight-Tiramisu as inspiration, but the README does not document enough about that project's current features, compatibility, or distribution to present it as a complete substitute. The concrete alternative that can be evaluated from the README is the device's own flashlight interface, not an assumed competitor feature set. FlashDim is the wrong choice when the requirement is guaranteed availability across many Android models, confirmed operation on a phone absent from its supported devices, or documented control over pattern timing. Its local operation and compact feature set do not resolve hardware variance. ## Maintenance, License, and Upgrade Considerations The repository is not archived. Its last push was on 2026-08-28, and the release history shows v2.5.3 published on 2026-08-28, followed by v2.5.2 on 2026-08-27 and v2.5.0 on 2026-08-23. That is evidence of recent project activity within the documented release history, although the README does not provide an upgrade policy or a detailed compatibility matrix for each release. The project uses the Apache-2.0 license. The repository includes an Apache License 2.0 grant, but this review does not interpret the license or provide legal advice. Users who intend to redistribute the application or incorporate its code should read the LICENSE file and review their obligations directly. For upgrades, users would need to compare releases and confirm that their device remains supported, because brightness behavior depends on hardware. The README does not document rollback, migration between stores, or the changes in each release. Those are concrete checks to make before adopting a release for an operational or accessibility workflow. ## Conclusion Adopt FlashDim when an Android 13+ device exposes variable flashlight brightness and you need more than a binary flashlight control. Do not choose it for an unsupported device or for users who need a guaranteed cross-device brightness range, because the README states that full functionality is hardware limited. Verify device support and the behavior of the volume-button shortcut before replacing an existing flashlight tool. ## FAQ ### What Android version and devices does FlashDim support? FlashDim targets Android 13 and later, but full dimming is available only on devices whose flashlight hardware supports variable brightness. The README directs users to the project's supported-devices information for the device-specific list. ### Does FlashDim have SOS and Morse code modes? Yes. The README lists an SOS flash button and a Morse code flash mode. It does not document the available timing controls or the device-specific behavior of those patterns. ### Can FlashDim work without an internet connection? The README describes FlashDim as private, with no ads and no internet connection. The documentation does not provide a separate network configuration or a complete permissions explanation. ### How can I access FlashDim quickly on Android? FlashDim provides a quick settings tile and supports toggling the flashlight by pressing both volume buttons. The README does not document setup or shortcut configuration steps. ### What license does FlashDim use? FlashDim uses the Apache-2.0 license. The repository includes a LICENSE file and links to the Apache License 2.0. ## Sources - [cyb3rko/flashdim on GitHub](https://github.com/cyb3rko/flashdim) - [Issues](https://github.com/cyb3rko/flashdim/issues) - [License: Apache-2.0](https://github.com/cyb3rko/flashdim/blob/main/LICENSE) - [README](https://github.com/cyb3rko/flashdim/blob/main/README.md) - [Releases](https://github.com/cyb3rko/flashdim/releases) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/cyb3rko-flashdim