# GravityTimer vs MX Calculator

The clearest difference is update cadence: MX Calculator at weekly against GravityTimer's every 6 weeks. GravityTimer's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

GravityTimer ships an update every 6 weeks, MX Calculator weekly. Both last shipped on October 25, 2026.

## The numbers

| Metric | GravityTimer | MX Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 3 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [宣威 查](https://appshunter.io/developer/1503125409) | [作甲 盖](https://appshunter.io/developer/1616134933) |

## What reviewers say

### GravityTimer

[App page](https://appshunter.io/ios/app/gravitytimer/id6757189175)

**Features:** macOS Compatibility

**In-app purchases:** none


### MX Calculator

[App page](https://appshunter.io/ios/app/mx-calculator/id6760420963)

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

**In-app purchases:** none


## Frequently asked questions

### Is GravityTimer free?

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

### Is MX Calculator free?

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

### Do GravityTimer or MX Calculator have ads?

Neither GravityTimer nor MX Calculator shows ads.

### Which is updated more often, GravityTimer or MX Calculator?

GravityTimer ships an update every 6 weeks, and MX Calculator weekly. Most recently, GravityTimer was updated on October 25, 2026 and MX Calculator on October 25, 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.*