# Nap1 — user reviews

> 4 indexed App Store user reviews of Nap1 by Ferra Solutions (Pty) Ltd, rated 5.00/5 from 1 ratings.

- Source: https://appshunter.io/ios/app/nap1/id964514021/reviews
- App overview in markdown: https://appshunter.io/ios/app/nap1/id964514021.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (4 lowest-rated)

### 5/5 — What is the asterisk for?

*2018-02-15, version 1.7.0*

There is an asterisk on the calculator screen, just below the info symbol. It changes to a circle when you select it. I have not found an explanation for it anywhere on the theory pages or the YouTube videos.

**Developer response:** The ‘splat’ will turn the key click sound on or off.

### 5/5 — Great Addition!!!

*2016-08-05, version 1.6.0*

Has everything I have been searching for!!!

Half of the theories and mathematical encryptions are in-app purchases. But can be easily restored on your devices after purchase.

Customer Support is quick and friendly.

It has everything you will look for; from modular arithmetic to RSA encryption.

### 5/5 — excellent

*2015-04-19, version 1.3.0*

I love this app so useful I highly recommend it

### 5/5 — Brilliant

*2015-04-18, version 1.3.0*

This is a great app for all you math lovers. And for you non math lovers there are functions that are amazing. You can even make codes that are impossible to crack! Great 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 2026-06-10.*