# Harmony Keyboard vs REVBASE

The clearest difference is in-app purchases: REVBASE at none against Harmony Keyboard's 1. REVBASE also leads on ads (none vs shown) and update cadence (every 5 days vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Harmony Keyboard sells 1 in-app purchase, starting at $0.49 per month. REVBASE asks for nothing beyond the download.

Harmony Keyboard ships an update monthly, REVBASE every 5 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Harmony Keyboard | REVBASE |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 45 MB | 92 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SINCLAIR SYSTEM](https://appshunter.io/developer/1794147761) | [REGNITION, K.K.](https://appshunter.io/developer/1619949682) |

## What reviewers say

### Harmony Keyboard

[App page](https://appshunter.io/ios/app/harmony-keyboard/id6745786039)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $0.49 | per month |


### REVBASE

[App page](https://appshunter.io/ios/app/revbase/id6757727614)

Experience live saxophone quartet performances with extensive audio and video archives. Create playlists, view sheet music alongside performances, and stay updated on concert schedules. Premium membership unlocks full access to all content.

**Highlights:** 100+ live audio recordings, Create custom playlists, Background playback, Concert video archives, Live stream viewing, Interactive sheet music, Event schedules

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

**In-app purchases:** none


## Frequently asked questions

### Is Harmony Keyboard free?

Harmony Keyboard is free to download, with in-app purchases available.

### Is REVBASE free?

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

### Do Harmony Keyboard or REVBASE have ads?

Harmony Keyboard shows ads; REVBASE does not.

### Which is updated more often, Harmony Keyboard or REVBASE?

Harmony Keyboard ships an update monthly, and REVBASE every 5 days. Most recently, Harmony Keyboard was updated on October 6, 2026 and REVBASE on October 8, 2026.

---

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