# Keep Time vs CentiGrade Visual Tuner

The clearest difference is price: Keep Time at Free against CentiGrade Visual Tuner's $0.99. CentiGrade Visual Tuner's advantage is rating (5.0 vs 4.0) and in-app purchases (none vs 1). On ratings volume, ads, device support and iOS requirement there is nothing between them.

Keep Time is free to download; CentiGrade Visual Tuner costs $0.99 up front. Keep Time sells 1 one-off in-app purchase. CentiGrade Visual Tuner asks for nothing beyond the download.

CentiGrade Visual Tuner holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Keep Time ships an update every 4 months, CentiGrade Visual Tuner every 4 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Keep Time | CentiGrade Visual Tuner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/keep-time/id574330593/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/centigrade-visual-tuner/id6758646319/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 3 MB | 18 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Justin Okun](https://appshunter.io/developer/429363982) | [PHILIP BRADLEY KING](https://appshunter.io/developer/1874172215) |

## What reviewers say

### Keep Time

[App page](https://appshunter.io/ios/app/keep-time/id574330593)

This application provides musicians with a visual metronome to enhance their playing. It offers adjustable tempo, customizable sounds and colors, and various subdivision options. Advanced features for rhythm simulation are available through in-app purchases.

**Highlights:** Adjustable speed with touch gestures, 4 metronome sound options, 7 color choices for visualizer, Sub-division options (8th, 16th, triplets), Configurable visualizer beats per measure, Apple Watch remote tempo adjustment

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Feature Pack | $1.99 | one-time |


### 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 Keep Time free?

Keep Time is free to download, with in-app purchases available.

### Is CentiGrade Visual Tuner free?

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

### Which has better reviews, Keep Time or CentiGrade Visual Tuner?

CentiGrade Visual Tuner is rated higher. Keep Time averages 4.0 out of 5 from 2 ratings, while CentiGrade Visual Tuner averages 5.0 from 1 ratings.

### Do Keep Time or CentiGrade Visual Tuner have ads?

Neither Keep Time nor CentiGrade Visual Tuner shows ads.

### Which is updated more often, Keep Time or CentiGrade Visual Tuner?

Keep Time ships an update every 4 months, and CentiGrade Visual Tuner every 4 days. Most recently, Keep Time was updated on October 24, 2026 and CentiGrade Visual Tuner on October 24, 2026.

---

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