# MathGrid 100 vs Study Clock Timer

The clearest difference is in-app purchases: MathGrid 100 at none against Study Clock Timer's 1. MathGrid 100 also leads on iOS requirement (15.1 vs 17.0). Study Clock Timer's advantage is ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Study Clock Timer sells 1 one-off in-app purchase. MathGrid 100 asks for nothing beyond the download.

MathGrid 100 ships an update every 3 weeks, Study Clock Timer every 3 days. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | MathGrid 100 | Study Clock Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 40 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Ishikawa](https://appshunter.io/developer/1876490408) | [Tatsuya Kawasaki](https://appshunter.io/developer/562479077) |

## What reviewers say

### MathGrid 100

[App page](https://appshunter.io/ios/app/mathgrid-100/id6759038224)

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

**In-app purchases:** none


### Study Clock Timer

[App page](https://appshunter.io/ios/app/study-clock-timer/id6780480380)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a drink | $2.99 | one-time |


## Frequently asked questions

### Is MathGrid 100 free?

MathGrid 100 is free to download, with no in-app purchases.

### Is Study Clock Timer free?

Study Clock Timer is free to download, with in-app purchases available.

### Do MathGrid 100 or Study Clock Timer have ads?

MathGrid 100 shows ads; Study Clock Timer does not.

### Which is updated more often, MathGrid 100 or Study Clock Timer?

MathGrid 100 ships an update every 3 weeks, and Study Clock Timer every 3 days. Most recently, MathGrid 100 was updated on September 29, 2026 and Study Clock Timer on September 18, 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.*