# Study Timer! vs 100

The clearest difference is in-app purchases: 100 at none against Study Timer!'s 4. 100 also leads on ads (none vs shown). Study Timer!'s advantage is iOS requirement (10.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Study Timer! sells 4 in-app purchases, starting at $4.99 per 7 days. 100 asks for nothing beyond the download.

## The numbers

| Metric | Study Timer! | 100 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/study-timer/id1556811357/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 22.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 1 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [云珍 朱](https://appshunter.io/developer/1535376926) | [Kohei Kanagu](https://appshunter.io/developer/1530720615) |

## What reviewers say

### Study Timer!

[App page](https://appshunter.io/ios/app/study-timer/id1556811357)

This app helps users combat smartphone addiction and improve focus on learning. It uses timed alarms and lock modes to encourage users to put down their phones and stick to study plans. Ideal for students and parents seeking to manage screen time.

**Highlights:** Daily reminders to put down phone, Mandatory mode with unskippable alarms, Flip screen lock mode, Lock screen mode, Customizable time limits, Subscription for advanced features

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription a week | $4.99 | per 7 days |
| Subscription a week (trail) | $4.99 | per 7 days |
| Subscription a year | $24.99 | per year |
| Subscription a year (trail) | $24.99 | per year |


### 100

[App page](https://appshunter.io/ios/app/100-hour-rule/id6517349655)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Study Timer! free?

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

### Is 100 free?

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

### Do Study Timer! or 100 have ads?

Study Timer! shows ads; 100 does not.

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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.*