# VERSION RSI vs HeatingSave v4

The clearest difference is update cadence: VERSION RSI at every 5 months against HeatingSave v4's every 35 months. HeatingSave v4's advantage is iOS requirement (11.0 vs 14.0). 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.

VERSION RSI ships an update every 5 months, HeatingSave v4 every 35 months. The most recent releases landed on November 2, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | VERSION RSI | HeatingSave v4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 35 months |
| Size | 43 MB | 74 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TRIDIOM SL](https://appshunter.io/developer/1724004693) | [Tensor plc](https://appshunter.io/developer/456260021) |

## What reviewers say

### VERSION RSI

[App page](https://appshunter.io/ios/app/version-rsi/id1400205700)

**In-app purchases:** none


### HeatingSave v4

[App page](https://appshunter.io/ios/app/heatingsave-v4/id1442898500)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VERSION RSI free?

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

### Is HeatingSave v4 free?

HeatingSave v4 is free to download, with no in-app purchases.

### Do VERSION RSI or HeatingSave v4 have ads?

Neither VERSION RSI nor HeatingSave v4 shows ads.

### Which is updated more often, VERSION RSI or HeatingSave v4?

VERSION RSI ships an update every 5 months, and HeatingSave v4 every 35 months. Most recently, VERSION RSI was updated on November 2, 2026 and HeatingSave v4 on October 26, 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.*