# 528 Player vs KeyTempo

The clearest difference is price: KeyTempo at Free against 528 Player's $5.99. KeyTempo also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 1). 528 Player's advantage is ratings volume (92 vs 1) and iOS requirement (14.0 vs 16.0). On ads and device support there is nothing between them.

KeyTempo is free to download; 528 Player costs $5.99 up front. 528 Player sells 1 one-off in-app purchase. KeyTempo asks for nothing beyond the download.

KeyTempo holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: 528 Player has 92 ratings behind it against 1, so its average is the more settled of the two.

528 Player ships an update every 66 months, KeyTempo every 10 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 528 Player | KeyTempo |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [3.9 (92 ratings)](https://appshunter.io/ios/app/528-player/id1317604903/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/keytempo/id6759312811/reviews)** |
| Number of ratings | **92** | 1 |
| Positive reviews | 49.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 66 months | **Every 10 days** |
| Monetization | Paid | **Free** |
| Size | 22 MB | 1 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ophir Paz](https://appshunter.io/developer/633600719) | [DONG CHEOL HAN](https://appshunter.io/developer/1864819299) |

## What reviewers say

### 528 Player

[App page](https://appshunter.io/ios/app/528-player/id1317604903)

This app allows you to tune your music to the 528Hz frequency, believed to promote harmony and healing. It offers a full-featured listening experience with EQ and no ads or limitations, designed to bring a brighter feeling and support well-being.

**Highlights:** Pitch shift music to 528Hz tuning, Full access with no limitations, Built-in Equalizer (EQ), No advertisements, One-time payment, no in-app purchases

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 528Player Full Features | $5.99 | one-time |

**What reviewers like**

- 🎶 Great music player
- ✨ Converts music to 528hz tuning
- 🎧 Good sound quality
- 💡 Innovative concept for music tuning
- 😊 Users feel better energy/moods

**What reviewers complain about**

- 🐛 App crashes frequently
- 🚫 Cannot import local music
- 🔇 No sound for some songs
- ⚠️ Not compatible with Apple Music
- 📉 Quality loss during conversion

**Reported bugs**

- App crashes on opening
- App does not open
- Cannot import local music
- Some songs play with no sound
- Music cuts off at the end

**Requested features**

- Add 639hz or 417hz frequencies
- Add 'Recently Added' option
- Add volume normalization, replay gain, peak adjustment, auto-stop
- Implement pitch control for -32 cents
- Continuous playback for albums


### KeyTempo

[App page](https://appshunter.io/ios/app/keytempo/id6759312811)

Adjust music pitch and tempo in real-time without affecting the other. Loop sections for practice or slow down audio for learning. Save your adjusted tracks as new files. Works offline with an intuitive interface.

**Highlights:** Real-time pitch control, Real-time tempo control, A-B repeat looping, Export adjusted audio, Supports multiple audio formats, Offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is 528 Player free?

528 Player costs $5.99, and also offers in-app purchases.

### Is KeyTempo free?

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

### Which has better reviews, 528 Player or KeyTempo?

KeyTempo is rated higher. 528 Player averages 3.9 out of 5 from 92 ratings, while KeyTempo averages 5.0 from 1 ratings.

### Do 528 Player or KeyTempo have ads?

Neither 528 Player nor KeyTempo shows ads.

### Which is updated more often, 528 Player or KeyTempo?

528 Player ships an update every 66 months, and KeyTempo every 10 days. Most recently, 528 Player was updated on October 24, 2026 and KeyTempo on October 24, 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.*