# tec2SKILL Sensor technology vs Chemistry Solver AI

The clearest difference is in-app purchases: tec2SKILL Sensor technology at none against Chemistry Solver AI's 2. tec2SKILL Sensor technology also leads on ads (none vs shown). Chemistry Solver AI's advantage is update cadence (monthly vs every 12 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Chemistry Solver AI sells 2 in-app purchases, starting at $4.99 per 7 days. tec2SKILL Sensor technology asks for nothing beyond the download.

tec2SKILL Sensor technology ships an update every 12 months, Chemistry Solver AI monthly. The most recent releases landed on October 2, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | tec2SKILL Sensor technology | Chemistry Solver AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Monthly** |
| Size | 468 MB | 57 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [ETS DIDACTIC GMBH](https://appshunter.io/developer/1209946511) | [Serhii Shlykov](https://appshunter.io/developer/1809794912) |

## What reviewers say

### tec2SKILL Sensor technology

[App page](https://appshunter.io/ios/app/tec2skill-sensor-technology/id1350336589)

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

**In-app purchases:** none


### Chemistry Solver AI

[App page](https://appshunter.io/ios/app/chemistry-solver-ai/id6759658452)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemistry Weekly | $4.99 | per 7 days |
| Chemistry Solver Yearly Premium | $29.99 | per year |


## Frequently asked questions

### Is tec2SKILL Sensor technology free?

tec2SKILL Sensor technology is free to download, with no in-app purchases.

### Is Chemistry Solver AI free?

Chemistry Solver AI is free to download, with in-app purchases available.

### Do tec2SKILL Sensor technology or Chemistry Solver AI have ads?

Chemistry Solver AI shows ads; tec2SKILL Sensor technology does not.

### Which is updated more often, tec2SKILL Sensor technology or Chemistry Solver AI?

tec2SKILL Sensor technology ships an update every 12 months, and Chemistry Solver AI monthly. Most recently, tec2SKILL Sensor technology was updated on October 2, 2026 and Chemistry Solver AI on September 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.*