# BTT Lah! vs Photon App

The clearest difference is in-app purchases: Photon App at none against BTT Lah!'s 4. Photon App also leads on update cadence (daily vs fortnightly) and iOS requirement (11.1 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. BTT Lah! sells 4 one-off in-app purchases. Photon App asks for nothing beyond the download.

BTT Lah! ships an update fortnightly, Photon App daily. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | BTT Lah! | Photon App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 98 MB |
| Requires iOS | 15.0 | **11.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Appsaur.com Pte Ltd](https://appshunter.io/developer/1471583826) | [Ahmed Mohamed Abdelrahman Hassan](https://appshunter.io/developer/1675484564) |

## What reviewers say

### BTT Lah!

[App page](https://appshunter.io/ios/app/btt-lah-basic-theory-test/id1493701248)

This app helps you prepare for your driving theory test with features designed to reduce eye strain and optimize learning. It uses smart algorithms to focus on your weak areas and reinforces learning through automated repetition and progress tracking.

**Highlights:** Reduced eye strain design, Adaptive question inflow, Automated short-term memory rehearsal, Detailed result analysis, Progress monitoring charts, Timed e-trial tests, Question and answer shuffling

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 600 BTT Questions All language | $12.99 | one-time |
| 600 BTT Questions All language | $24.99 | one-time |
| ProEnglish600Question | $28.99 | one-time |
| ProALLLanguages600Questions | $54.99 | one-time |


### Photon App

[App page](https://appshunter.io/ios/app/photon-app/id6446026441)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BTT Lah! free?

BTT Lah! is free to download, with in-app purchases available.

### Is Photon App free?

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

### Do BTT Lah! or Photon App have ads?

Neither BTT Lah! nor Photon App shows ads.

### Which is updated more often, BTT Lah! or Photon App?

BTT Lah! ships an update fortnightly, and Photon App daily. Most recently, BTT Lah! was updated on October 2, 2026 and Photon App on October 3, 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.*