# FlexTunerPro — Customizable tuner

> Customizable tuner (iPhone/iPad app by SATOSHI NAGASAKA.)

- Source: https://appshunter.io/ios/app/flextunerpro/id6751446919 (this page in markdown: same URL + `.md`)
- Developer: [SATOSHI NAGASAKA](https://appshunter.io/developer/1826446450)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 3 MB
- Languages: American English, Japanese
- Released: 2025-09-16
- Data updated: 2026-01-07
- User reviews in markdown: https://appshunter.io/ios/app/flextunerpro/id6751446919/reviews.md

## What is FlexTunerPro?

Key Features

◆ 3 Tuning Modes
• Tuner(Auto): Automatically detects and tunes played strings
• Tuner(Manual): Select specific strings for precise tuning
• Practice: Ear training mode with reference tones

◆ Instrument Profiles
• 6-String Guitar (Standard tuning)
• 7-String Guitar• 4-String Bass
• 5-String Bass
• Ukulele (Soprano)
• Contrabass and other Strings Instruments 
• Create custom profiles

◆ Customization
• A4 reference pitch adjustment (430-450Hz)
• Individual string frequency settings
• Supports tuning for situations such as when using a guitar capo through overall pitch adjustment
• Profile export/import
• Guide tone waveform can be changed from Profile Edit. Available waveforms: Sawtooth, Square, Triangle, and Original (easier to hear in low frequency ranges)

◆ User-Friendly
• Large, clear tuning meter
• Precise cent display
• Auto-lock prevention during tuning
• Japanese/English support

※ Important Note
  Due to the harmonics produced by musical instruments, the octave of the detected pitch may sometimes be incorrectly identified.
  Please note that there is currently no available method to improve this misdetection issue.

30-Day Free Trial
Try all features free for 30 days.

Premium Version
After the trial period, a one-time purchase is required to continue using the app.
Once purchased, enjoy all features forever.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium | $2.99 | one-time |



## Version history (last 3 releases)

### 1.1.5 — 2026-01-06

Minor corrections to iOS26 support
Change the default of the guide sound to the original waveform

### 1.1.1 — 2025-10-06

Added "Original" tone to guide sounds, easier to hear in low frequency ranges

### 1.0 — 2025-09-16

No release notes.

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## More apps by SATOSHI NAGASAKA

- [mod.Timer](https://appshunter.io/ios/app/modtimer/id6749108204)

All apps by SATOSHI NAGASAKA: https://appshunter.io/developer/1826446450

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-01-07.*