# Simple Solar vs Heatpunk

The clearest difference is in-app purchases: Heatpunk at none against Simple Solar's 4. Simple Solar's advantage is iOS requirement (16.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Simple Solar sells 4 in-app purchases, starting at $6.99 per month. Heatpunk asks for nothing beyond the download.

Simple Solar ships an update every 3 weeks, Heatpunk every 2 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Simple Solar | Heatpunk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 73 MB | 119 MB |
| Requires iOS | **16.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Minutia Mobile](https://appshunter.io/developer/1446213585) | [Smug Energy](https://appshunter.io/developer/1784249864) |

## What reviewers say

### Simple Solar

[App page](https://appshunter.io/ios/app/simple-solar/id6743857767)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Automation | $6.99 | per month |
| Yearly Subscription | $59.00 | per year |
| Remove Ads | $2.99 | one-time |
| Remove Ad's | $2.99 | one-time |


### Heatpunk

[App page](https://appshunter.io/ios/app/heatpunk/id6780822840)

**In-app purchases:** none


## Frequently asked questions

### Is Simple Solar free?

Simple Solar is free to download, with in-app purchases available.

### Is Heatpunk free?

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

### Do Simple Solar or Heatpunk have ads?

Neither Simple Solar nor Heatpunk shows ads.

### Which is updated more often, Simple Solar or Heatpunk?

Simple Solar ships an update every 3 weeks, and Heatpunk every 2 weeks. Most recently, Simple Solar was updated on October 30, 2026 and Heatpunk on November 5, 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.*