Freedom251 › Musical Tuner Apps
DaTuner
What DaTuner is
DaTuner is an Android chromatic tuner and metronome for tuning instruments, including guitar, bass, violin, ukulele, banjo, cello, piano, and mandolin. It works offline and is designed to keep operating in noisy environments. Auto-sensitivity can start tuning without setup, and manual sensitivity controls let you adjust it. The display turns green when a pitch reaches the optimal tuning range. Screen lock holds a chosen note, while filter lock isolates a selected range. You can adjust the reference frequency manually or use an external reference for orchestra tuning. The stated sample-rate range is 8kHz to 48kHz. The free plan costs nothing and includes ads and fewer features than Premium. The PRO version adds a strobe display with up to four overtones, transposition, custom temperaments, notation options, a harmonic pitch pipe, and an enhanced tuning algorithm. Google Play says the app may collect and share app information, performance and device or other IDs; data is encrypted in transit and cannot be deleted. Its privacy policy says microphone audio is processed on the device and not stored on company servers.
Who it suits
DaTuner suits musicians who want an offline tuner and metronome for a range of instruments, including in noisy settings. Orchestra players can set a reference frequency manually or use an external reference.
What it does well
- Works offline and is designed for noisy environments
- Supports a range of string and keyboard instruments
- Auto-sensitivity starts tuning without manual setup
- Screen and filter locks help isolate specific notes
- Free plan is available
What to know first
- Free plan includes ads and fewer features than Premium
- Available on Android only
- Google Play says collected data cannot be deleted
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | ads · fewer features than Premium | Free |
| Premium | no ads · additional features | On request |
As useprometheus.app lists them, read 30 Sept 2026. The maker's own page has the final word.
Verdict
DaTuner combines offline tuning with note locks, adjustable sensitivity, and reference frequency controls. The free plan covers core use, while the PRO version adds alternate tuning and display options.
Facts from DaTuner's own pages
- Audio handling
- The privacy policy says audio accessed through microphone permissions is used for app features, is not stored on the company's servers and is processed on the device. · useprometheus.app, 30 Sept 2026
- Audio range
- The stated sample-rate range is 8kHz to 48kHz. · useprometheus.app, 30 Sept 2026
- Data safety
- Google Play states that the app may collect and share app info, performance and device or other IDs, encrypts data in transit, and says data cannot be deleted. · play.google.com, 30 Sept 2026
- Headquarters
- Dover, Delaware, United States · useprometheus.app, 28 Sept 2026
- Lock controls
- Screen lock can hold a specific note and filter lock can isolate a specific note range. · useprometheus.app, 30 Sept 2026
- Offline use
- The app works offline and is designed to operate in noisy environments. · useprometheus.app, 30 Sept 2026
- Platform
- DaTuner is described as an Android app and is distributed through Google Play. · play.google.com, 30 Sept 2026
- Premium features
- The PRO version includes a strobe display with up to four overtones, transposition, custom temperaments, notation options, a harmonic pitch pipe and an enhanced tuning algorithm. · useprometheus.app, 30 Sept 2026
- Privacy scope
- The privacy policy addresses GDPR, Brazilian LGPD and California CCPA requirements. · useprometheus.app, 30 Sept 2026
- Purpose
- DaTuner is a chromatic tuner and metronome app for tuning instruments. · useprometheus.app, 30 Sept 2026
- Reference frequency
- Reference frequency can be adjusted manually or with an external reference for orchestra tuning. · useprometheus.app, 30 Sept 2026
- Sensitivity
- Auto-sensitivity starts tuning without manual configuration, while sensitivity can also be fine-tuned manually. · useprometheus.app, 30 Sept 2026
- Support
- Support is provided at [email protected]. · useprometheus.app, 30 Sept 2026
- Supported instruments
- The app supports guitar, bass, violin, ukulele, banjo, cello, piano, mandolin and other instruments. · useprometheus.app, 30 Sept 2026
- Tuning display
- The screen turns green when the pitch is within the optimal tuning range. · useprometheus.app, 30 Sept 2026
Where DaTuner stands on Freedom251
- Musical Tuner Apps#12 of 32