# Plottron vs Chess Clock

The clearest difference is in-app purchases: Plottron at none against Chess Clock's 1. Plottron also leads on iOS requirement (15.0 vs 17.0). Chess Clock's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Chess Clock sells 1 one-off in-app purchase. Plottron asks for nothing beyond the download.

Plottron ships an update every 2 months, Chess Clock every 5 days. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Plottron | Chess Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/plottron/id1037723649/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 2 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Billy Lin](https://appshunter.io/developer/1037723648) | [Dmitry Kalashnikov](https://appshunter.io/developer/6798414331) |

## What reviewers say

### Plottron

[App page](https://appshunter.io/ios/app/plottron/id1037723649)

This application offers advanced 2D and 3D graphing capabilities for various function types, alongside a comprehensive scientific calculator. It supports implicit graphing, complex number visualization, and symbolic differentiation. The calculator includes user-defined variables, live evaluation, and probability density functions.

**Highlights:** 2D and 3D graphing, Implicit graphing, Complex number visualization, Symbolic differentiation, User-defined variables and functions, Live evaluation, Calculation history

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Chess Clock

[App page](https://appshunter.io/ios/app/chess-clock-tempo-blitz-timer/id6817149007)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tempo Pro | $4.99 | one-time |


## Frequently asked questions

### Is Plottron free?

Plottron is free to download, with no in-app purchases.

### Is Chess Clock free?

Chess Clock is free to download, with in-app purchases available.

### Do Plottron or Chess Clock have ads?

Neither Plottron nor Chess Clock shows ads.

### Which is updated more often, Plottron or Chess Clock?

Plottron ships an update every 2 months, and Chess Clock every 5 days. Most recently, Plottron was updated on October 1, 2026 and Chess Clock on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*