# Add and subtract within 20 — user reviews

> 1 indexed App Store user reviews of Add and subtract within 20 by Sergey Malugin.

- Source: https://appshunter.io/ios/app/add-and-subtract-within-20/id757149544/reviews
- App overview in markdown: https://appshunter.io/ios/app/add-and-subtract-within-20/id757149544.md

## Most critical reviews (1 lowest-rated)

### 4/5 — Great

*2014-02-05*

Exactly the type of adding app I have been looking for! I have taught my students to use tally marks to add and this app allows them to draw those marks. We do have to erase those tally marks from the screen before writing the final answer, which is why it is 4 stars.

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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 2026-08-24.*