Mandolin Tuner vs Keep Black
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mandolin Tuner
This utility app provides accurate tuning notes for the mandolin, covering the standard G, D, A, and E strings. It's designed to help musicians quickly and easily achieve the correct pitch for their instrument.
- Plays tuning notes
- Standard mandolin tuning (G D A E)
- Easy to use
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Get your mandolin in tune fast with precise reference notes for standard tuning (G D A E).
Keep Black
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Turns your TV display output to complete black so you can keep playing music or podcasts while your display shows nothing. FEATURES - Black screen to save your eyes and the environment from unnecessary visual clutter when you are listening to music or podcasts. - Prevents the screen saver from kicking in while the screen is turned to black. This is similar to a screen saver, but also prevents the default screen savers from kicking in. - Continue to listen to audio in the background with Apple Music, Spotify or Tidal. Works with any other that supports music or audio playback. - A blinking visual indicator that can be turned on as needed with a timer feature. - Move the application to the top shelf for an elegant black background for your Apple TV home screen. - Minimalistic user interface and settings HOW TO - You can also show a green blinking indication to identify that the application is still active. It can set to a time duration as well. Settings related to this feature can be changed by changing the settings at Settings > Apps > Keep Black. - To exit the app, simply press the menu or the home button on your Siri remote. - This app also prevents the Apple TV from sleeping while active, so please make sure you are turning it off when you are done watching. - Notification overlays will continue to show while in the application. To disable them, please goto Settings > Apps > TV, find the notifications section and disable notifications. WORKS GREAT - On OLED, LCD and QLED displays made by Samsung, LG, Sony, Philips, Vizio, Panasonic and also displays that support true blacks with HDR. - On Projectors made by Xiaomi, Epson and BenQ and others. - Other displays such as external monitors being used as the output device on Apple TV with HDMI.
Screenshots
Verdict
The clearest difference is price: Mandolin Tuner at Free against Keep Black's $1.99. Mandolin Tuner also leads on device support (3 vs 1). Keep Black's advantage is ads (none vs shown). On in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Mandolin Tuner is free to download; Keep Black costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Mandolin Tuner | Keep Black |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.5 (783 ratings) — better | — |
| Positive reviews | 60.5% of reviews | — |
| Number of ratings | 783 — better | — |
| Update frequency | Every 16 months | — |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | Apple TV |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Alvin Yu | Bhagya Silva |
Bugs and requests
Mandolin Tuner
Reported bugs
3 issues- App not working or providing inaccurate tuning
- Ads covering the buttons and causing accidental clicks
- Compatibility issues with newer devices
Requested features
4 requests- Option to turn off ads
- Larger buttons for easier use
- Support for alternate mandolin tunings
- Display the note being played
Keep Black
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Mandolin Tuner
No in-app purchases
Keep Black
No in-app purchases






