# Moon vs 555 Timer & Oscillators Pro

The clearest difference is update cadence: 555 Timer & Oscillators Pro at every 2 months against Moon's every 26 months. Moon's advantage is price ($0.99 vs $4.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Moon costs $0.99 and 555 Timer & Oscillators Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Moon ships an update every 26 months, 555 Timer & Oscillators Pro every 2 months. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Moon | 555 Timer & Oscillators Pro |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 2 months** |
| Size | 1.4 GB | 22 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 9+ | 4+ |
| Developer | [Alparslan Topbas](https://appshunter.io/developer/1130875171) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Moon

[App page](https://appshunter.io/ios/app/moon-apollo/id1585514583)

**Features:** Vision Pro support

**In-app purchases:** none


### 555 Timer & Oscillators Pro

[App page](https://appshunter.io/ios/app/555-timer-and-oscillators-pro/id6504415162)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Moon free?

Moon costs $0.99, with no in-app purchases.

### Is 555 Timer & Oscillators Pro free?

555 Timer & Oscillators Pro costs $4.99, with no in-app purchases.

### Do Moon or 555 Timer & Oscillators Pro have ads?

Neither Moon nor 555 Timer & Oscillators Pro shows ads.

### Which is updated more often, Moon or 555 Timer & Oscillators Pro?

Moon ships an update every 26 months, and 555 Timer & Oscillators Pro every 2 months. Most recently, Moon was updated on October 1, 2026 and 555 Timer & Oscillators Pro on October 19, 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.*