# SimpleCalc. vs Full Screen Clock

The clearest difference is price: SimpleCalc. at Free against Full Screen Clock's $1.99. SimpleCalc. also leads on iOS requirement (15.0 vs 18.4). Full Screen Clock's advantage is update cadence (every 4 weeks vs every 7 months). On ads, in-app purchases and device support there is nothing between them.

SimpleCalc. is free to download; Full Screen Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SimpleCalc. ships an update every 7 months, Full Screen Clock every 4 weeks. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SimpleCalc. | Full Screen Clock |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 weeks** |
| Size | 16 MB | 0 MB |
| Requires iOS | **15.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Romain Rousseau](https://appshunter.io/developer/1645997193) | [Hoa Tran](https://appshunter.io/developer/963498718) |

## What reviewers say

### SimpleCalc.

[App page](https://appshunter.io/ios/app/simplecalc/id6447461450)

**Features:** macOS Compatibility

**In-app purchases:** none


### Full Screen Clock

[App page](https://appshunter.io/ios/app/full-screen-clock-clearclock/id6752286294)

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

**In-app purchases:** none


## Frequently asked questions

### Is SimpleCalc. free?

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

### Is Full Screen Clock free?

Full Screen Clock costs $1.99, with no in-app purchases.

### Do SimpleCalc. or Full Screen Clock have ads?

Neither SimpleCalc. nor Full Screen Clock shows ads.

### Which is updated more often, SimpleCalc. or Full Screen Clock?

SimpleCalc. ships an update every 7 months, and Full Screen Clock every 4 weeks. Most recently, SimpleCalc. was updated on September 14, 2026 and Full Screen Clock on September 8, 2026.

---

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