# ToneGen PlusMinus vs CentiGrade Visual Tuner

The clearest difference is price: ToneGen PlusMinus at Free against CentiGrade Visual Tuner's $0.99. CentiGrade Visual Tuner's advantage is update cadence (every 4 days vs every 3 months) and iOS requirement (13.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

ToneGen PlusMinus is free to download; CentiGrade Visual Tuner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ToneGen PlusMinus ships an update every 3 months, CentiGrade Visual Tuner every 4 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | ToneGen PlusMinus | CentiGrade Visual Tuner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/centigrade-visual-tuner/id6758646319/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Paid |
| Size | 39 MB | 18 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dan Richardson](https://appshunter.io/developer/1723614187) | [PHILIP BRADLEY KING](https://appshunter.io/developer/1874172215) |

## What reviewers say

### ToneGen PlusMinus

[App page](https://appshunter.io/ios/app/tonegen-plusminus/id6758056304)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CentiGrade Visual Tuner

[App page](https://appshunter.io/ios/app/centigrade-visual-tuner/id6758646319)

This app provides instant, ad-free tuning with a unique rolling trace feature for pitch practice. Its interface dynamically zooms as you approach the target note, offering multiple visual modes and presets for various instruments.

**Highlights:** Instant tuning on launch, Rolling trace for pitch history, Dynamic zoom interface, Fluid wave visualizer, Chromatic, Guitar, Bass presets

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ToneGen PlusMinus free?

ToneGen PlusMinus is free to download, with no in-app purchases.

### Is CentiGrade Visual Tuner free?

CentiGrade Visual Tuner costs $0.99, with no in-app purchases.

### Do ToneGen PlusMinus or CentiGrade Visual Tuner have ads?

Neither ToneGen PlusMinus nor CentiGrade Visual Tuner shows ads.

### Which is updated more often, ToneGen PlusMinus or CentiGrade Visual Tuner?

ToneGen PlusMinus ships an update every 3 months, and CentiGrade Visual Tuner every 4 days. Most recently, ToneGen PlusMinus was updated on October 25, 2026 and CentiGrade Visual Tuner on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*