# Decay calc — user reviews

> 4 indexed App Store user reviews of Decay calc by Alexey Baranov, rated 1.00/5 from 1 ratings.

- Source: https://appshunter.io/ios/app/decay-calc/id1479526735/reviews
- App overview in markdown: https://appshunter.io/ios/app/decay-calc/id1479526735.md
- Rating breakdown: 5★ 0 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 1

## Most critical reviews (4 lowest-rated)

### 1/5 — Only preset Isotopes (many missing or locked)

*2021-11-23*

Ac-225 is not available… why isn’t it possible to define Isotopes?
Useless App!

### 2/5 — Так себе

*2020-10-26*

А с каких это пор активность в Зивертах и Рентгенах измеряется? За 75-то рублей можно было бы вкладку dose rate создать. Неплохо бы добавить кБк и МБк и Кюри.

### 5/5 — Лучшее приложение

*2020-07-10*

Одно из лучших приложений в своём роде

### 5/5 — Good app for engineers

*2020-05-02*

I’ve been searching for long time for application like this. Big list of isotopes, convenient interface. Great for engineers. Thanks!

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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 2026-06-05.*