# HeatMap vs OpenRead

The clearest difference is update cadence: OpenRead at every 2 days against HeatMap's every 2 weeks. OpenRead also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HeatMap ships an update every 2 weeks, OpenRead every 2 days. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | HeatMap | OpenRead |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/heatmap-habit-tracker/id6757341452/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 7 MB | 43 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Leonid Chirkov](https://appshunter.io/developer/1853746143) | [KyoungChan Hwang](https://appshunter.io/developer/1837062084) |

## What reviewers say

### HeatMap

[App page](https://appshunter.io/ios/app/heatmap-habit-tracker/id6757341452)

Visualize your progress with a daily streak tracker that uses a GitHub-style contribution grid. Log habits with simple taps, counters, or timers, and gain insights from detailed statistics. Integrates with home screen widgets and Siri Shortcuts for seamless tracking.

**Highlights:** GitHub-style contribution grid visualization, Yes/No, Counter, and Timer tracking modes, Detailed statistics and trend analysis, Home Screen and Lock Screen widgets, Siri Shortcuts integration, Offline functionality with optional sync, Multiple color palettes and themes

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

**In-app purchases:** none


### OpenRead

[App page](https://appshunter.io/ios/app/openread-pdf-document-reader/id6812635014)

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

**In-app purchases:** none


## Frequently asked questions

### Is HeatMap free?

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

### Is OpenRead free?

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

### Do HeatMap or OpenRead have ads?

Neither HeatMap nor OpenRead shows ads.

### Which is updated more often, HeatMap or OpenRead?

HeatMap ships an update every 2 weeks, and OpenRead every 2 days. Most recently, HeatMap was updated on October 17, 2026 and OpenRead on October 19, 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.*