# TriKey vs 4 bars Metronome

The clearest difference is price: 4 bars Metronome at Free against TriKey's $9.99. 4 bars Metronome also leads on update cadence (every 5 days vs every 2 months). TriKey's advantage is iOS requirement (12.0 vs 16.4). On ads, in-app purchases and device support there is nothing between them.

4 bars Metronome is free to download; TriKey costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TriKey ships an update every 2 months, 4 bars Metronome every 5 days. The most recent releases landed on October 3, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | TriKey | 4 bars Metronome |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 5 MB | 26 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Marcos Kohler](https://appshunter.io/developer/1024379665) | [Hitoshi Yamaguchi](https://appshunter.io/developer/1606219554) |

## What reviewers say

### TriKey

[App page](https://appshunter.io/ios/app/trikey/id1406537477)

**In-app purchases:** none


### 4 bars Metronome

[App page](https://appshunter.io/ios/app/4-bars-metronome/id6450316704)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TriKey free?

TriKey costs $9.99, with no in-app purchases.

### Is 4 bars Metronome free?

4 bars Metronome is free to download, with no in-app purchases.

### Do TriKey or 4 bars Metronome have ads?

Neither TriKey nor 4 bars Metronome shows ads.

### Which is updated more often, TriKey or 4 bars Metronome?

TriKey ships an update every 2 months, and 4 bars Metronome every 5 days. Most recently, TriKey was updated on October 3, 2026 and 4 bars Metronome on September 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.*