# BTT 123 SG (Basic Theory) — user reviews

> 3 indexed App Store user reviews of BTT 123 SG (Basic Theory) by APPTREME STUDIO, rated 2.30/5 from 3 ratings.

- Source: https://appshunter.io/ios/app/btt-123-sg-basic-theory/id1140305786/reviews
- App overview in markdown: https://appshunter.io/ios/app/btt-123-sg-basic-theory/id1140305786.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 2

## Most critical reviews (3 lowest-rated)

### 1/5 — Outdated info. Broken buttons. Faulty graphics makes quiz unusable

*2021-10-01*

See title

### 1/5 — Out of date and not functioning

*2021-08-05*

1. Questions are out of date, not adjusted to the current regulations. For example, PDL are valid for 24 months from 2017 but the app still prompts 6 month. 
2. Correct and Wrong signs occupy the center screen and keep on flashing while you are practicing questions. A lot of questions are blocked by this bug.

### 3/5 — Crashes on iPad iOS 9.3.5

*2018-08-02*

Used to work on my iPhone 6s but just crashes on start with iPad iOS 9.3.5
Please fix! I paid for this app

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*