# tec2SKILL Smart Maintenance vs HEar Studie

The clearest difference is update cadence: HEar Studie at every 4 days against tec2SKILL Smart Maintenance's every 8 months. tec2SKILL Smart Maintenance's advantage is iOS requirement (15.0 vs 17.6). 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.

tec2SKILL Smart Maintenance ships an update every 8 months, HEar Studie every 4 days. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | tec2SKILL Smart Maintenance | HEar Studie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 days** |
| Size | 524 MB | 11 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ETS DIDACTIC GMBH](https://appshunter.io/developer/1209946511) | [Karlsruher Institut fuer Technologie (KA)](https://appshunter.io/developer/1650206749) |

## What reviewers say

### tec2SKILL Smart Maintenance

[App page](https://appshunter.io/ios/app/tec2skill-smart-maintenance/id1542007569)

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

**In-app purchases:** none


### HEar Studie

[App page](https://appshunter.io/ios/app/hear-studie/id6740092996)

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

**In-app purchases:** none


## Frequently asked questions

### Is tec2SKILL Smart Maintenance free?

tec2SKILL Smart Maintenance is free to download, with no in-app purchases.

### Is HEar Studie free?

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

### Do tec2SKILL Smart Maintenance or HEar Studie have ads?

Neither tec2SKILL Smart Maintenance nor HEar Studie shows ads.

### Which is updated more often, tec2SKILL Smart Maintenance or HEar Studie?

tec2SKILL Smart Maintenance ships an update every 8 months, and HEar Studie every 4 days. Most recently, tec2SKILL Smart Maintenance was updated on October 9, 2026 and HEar Studie on October 6, 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.*