# SUS4 Tuner — Tune anything. Stay in tune.

> Tune anything. Stay in tune. (iPhone/iPad app by Paul Smith.)

- Source: https://appshunter.io/ios/app/sus4-tuner/id6777229810 (this page in markdown: same URL + `.md`)
- Developer: [Paul Smith](https://appshunter.io/developer/319584506)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 20 MB
- Languages: English
- Released: 2026-06-12
- Data updated: 2026-07-04
- User reviews in markdown: https://appshunter.io/ios/app/sus4-tuner/id6777229810/reviews.md

## What is SUS4 Tuner?

In tune in seconds. Every instrument, every note.

SUS4 Tuner is a chromatic tuner built for anyone who plays — guitar, bass, ukulele, violin, brass, woodwind, or anything in between. Open the app, play a note, and the needle settles on pitch before your hand is off the string.

The A4 reference is adjustable from 430 to 450 Hz so you can match any ensemble, pit orchestra, or recording session. Compact view keeps things simple; Stage view enlarges the display so you can read it from a music stand across the room. The Apple Watch companion means you can tune without touching your phone at all.

• Chromatic tuner — accurate to the cent
• Instrument presets: guitar, bass, ukulele, violin, brass, and woodwind
• Adjustable A4 reference: 430 to 450 Hz
• Cents readout so you know exactly how far off you are
• Compact view for everyday use; Stage view for the music stand
• Apple Watch companion — glance, tune, play
• Subscribe monthly, or unlock the full SUS4 suite forever: alternative tunings and brass/woodwind presets

The tuner runs entirely on your device. No audio is ever sent to a server. No account needed.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SUS4 Suite (all 24 apps) | $4.99 | per month |
| SUS4 Tuner Pro Monthly | $0.99 | per month |



## Version history (last 4 releases)

### 1.1.0 — 2026-07-02

Every advertised feature is now fully functional, Pro genuinely unlocks real features, and the new SUS4 All-Access pass unlocks all 24 SUS4 apps with a 7-day free trial. Faster and clearer throughout.

### 1.0.2 — 2026-06-18

Reliability and performance improvements throughout the app.

### 1.0.1 — 2026-06-13

You can now redeem a 4chordsStudios access code to unlock the full app — open the unlock screen and tap “Have a code? Redeem it”. Plus stability and performance improvements.

### 1.0 — 2026-06-13

No release notes.

## More apps by Paul Smith

- [iScrobble Pick And Mix](https://appshunter.io/ios/app/iscrobble-pick-and-mix/id319584503)
- [iSwipeMusic](https://appshunter.io/ios/app/iswipemusic/id334689181)
- [iShuffleAlbums](https://appshunter.io/ios/app/ishufflealbums/id335009718)
- [iBreathalyzer](https://appshunter.io/ios/app/ibreathalyzer/id369686249)
- [SUS4 Pitch Pipe](https://appshunter.io/ios/app/sus4-pitch-pipe/id6777229584)

All apps by Paul Smith: https://appshunter.io/developer/319584506

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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 2026-07-04.*