# TSU vs Baikru Prep

The clearest difference is in-app purchases: TSU at none against Baikru Prep's 9. TSU also leads on iOS requirement (9.0 vs 13.0). Baikru Prep's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Baikru Prep sells 9 one-off in-app purchases. TSU asks for nothing beyond the download.

TSU ships an update every 3 months, Baikru Prep weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | TSU | Baikru Prep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 151 MB | 152 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thaksin University](https://appshunter.io/developer/1521592717) | [Nuttawat Chakitniran](https://appshunter.io/developer/1876737472) |

## What reviewers say

### TSU

[App page](https://appshunter.io/ios/app/tsu-smart/id1529571620)

**Features:** macOS Compatibility

**In-app purchases:** none


### Baikru Prep

[App page](https://appshunter.io/ios/app/baikru-prep/id6759080716)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Baikru Starter (4 เดือน) | $7.99 | one-time |
| ระบบติวใบประกอบวิชาชีพตลอดชีพ | $9.99 | one-time |
| Baikru Standard (1 ปี) | $9.99 | one-time |
| ระบบติวสอบครูผู้ช่วย 4 เดือน | $11.99 | one-time |
| ระบบติวสอบครูผู้ช่วยตลอดชีพ | $12.99 | one-time |
| ระบบติวสอบครูผู้ช่วย 1 ปี | $17.99 | one-time |
| Baikru Lifetime Pro | $19.99 | one-time |
| ระบบติวสอบครูผู้ช่วยตลอดชีพ | $29.99 | one-time |
| ติวสอบ 2 จักรวาลตลอดชีพ | $34.99 | one-time |


## Frequently asked questions

### Is TSU free?

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

### Is Baikru Prep free?

Baikru Prep is free to download, with in-app purchases available.

### Do TSU or Baikru Prep have ads?

Neither TSU nor Baikru Prep shows ads.

### Which is updated more often, TSU or Baikru Prep?

TSU ships an update every 3 months, and Baikru Prep weekly. Most recently, TSU was updated on October 25, 2026 and Baikru Prep on October 24, 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.*