Bass Tuner BT1 Pro 4+

Tune low-frequency instruments

JSplash Apps

Designed for iPad

    • 4.9 • 49 Ratings
    • $4.99



Bass Tuner BT1 is a specialized instrument tuner optimized for tuning low-frequency musical instruments. Tune any bass instrument (bass guitar, double bass, bassoon, bass clarinet, bass trombone, bass saxophone, cello etc.) with this extremely accurate and easy-to-use chromatic tuner. Bass Tuner BT1 also comes with a handy tone generator that plays any note as a reference for tuning.

- Includes all the features of a professional bass tuner.
- Extremely accurate (can be tuned to an accuracy of ±0.1 cents).
- Displays the current note being tuned along with its deviation and current frequency.
- Includes historical graph of the pitch that helps you with the tuning process.
- Tone generator that can generate reference tones over a note-range of 3 octaves.
- Ability to set the frequency of A₄ (for tunings where A₄ is not 440 hertz).

What’s New

Version 3.13.1

Fixed an issue with the tone generator.

Ratings and Reviews

4.9 out of 5
49 Ratings

49 Ratings

45thatguy75 ,

Best bass tuner for iPhone 15

****I imagine any iPhone.*****To the creator of the app, thank you, for making quick tuning app(from minor adjustments to full scale retune) and allowing us to enjoy it for free. I love and use it so much. Every month without doubt Apple Music takes from me in my opinion too much, you wanting $4.99 and I’m giving you that, you’re not taking it. In my opinion and I am no exception, if you’re using this app for over a month and not dropping the 4.99 for the paid version….frugal, that’s your new nickname😜download you will not regret it!!

Kabeyun ,

Excellent and accurate

Tried several other tuners, all of which were overfeatured or sururpsingly inaccurate, as much as nearly a half-pitch. BT1 is spot on, simple, and uses visual feedback so you can see if a string is tuned from across the room. Does one job and does it very well.

UrchinVT ,

Locks into the note like no other

I’ve tried quite a few tuner apps and was never satisfied until I found this one. It is wonderful for the bass guitar. Many tuners can’t lock into the low E’s vibrations. This does. It is also much more solid for guitar. Love it. Thank you!

App Privacy

The developer, JSplash Apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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