# Plottron — user reviews

> 7 indexed App Store user reviews of Plottron by Billy Lin, rated 4.80/5 from 11 ratings.

- Source: https://appshunter.io/ios/app/plottron/id1037723649/reviews
- App overview in markdown: https://appshunter.io/ios/app/plottron/id1037723649.md
- Rating breakdown: 5★ 9 · 4★ 2 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (7 lowest-rated)

### 4/5 — Factorial should be implemented as Gamma

*2026-03-23, version 1.8.7*

Looks like a splendid program.  A minor tweak is that the factorial function returns the wrong answer for negative numbers.  Implementing this as Gamma(Z-1) should fix.

### 4/5 — Great graphing calculator

*2020-08-30, version 1.7.1*

Very helpful, only complaint so far is it doesn’t work in horizontal

### 5/5 — Amazing complex function graphing

*2026-05-09, version 1.8.8*

Yes

### 5/5 — Best calculator app

*2023-06-09, version 1.7.4*

This is the best calculator app out there. Really love the dark mode skin too.

### 5/5 — Useful calculator

*2019-12-29*

Really good app, simple to use. Does what you need it to do and is easy to navigate

### 5/5 — Simply amazing!

*2016-09-26, version 1.2.3*

This is by far the best free graphing app on the App Store. There are no hidden fees and I haven't seen any ads yet. I would highly recommend this app to anyone.

### 5/5 — Most beautiful app in the store hands down.

*2015-10-07, version 1.0.1*

Best graphing calculator for on the go calculations. Simple and effective.

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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 2026-07-18.*