# techSampler vs Concept

The clearest difference is ads: techSampler at none against Concept's shown. techSampler also leads on iOS requirement (7.0 vs 13.0). Concept's advantage is update cadence (every 2 weeks vs every 4 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. techSampler sells 1 one-off in-app purchase and Concept sells 1 in-app purchase, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

techSampler ships an update every 4 months, Concept every 2 weeks. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | techSampler | Concept |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/techsampler/id626214040/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 92 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Byte Works, Inc.](https://appshunter.io/developer/286319447) | [FLORENT IAN, SALVATORE MASDOUNIER](https://appshunter.io/developer/1719614989) |

## What reviewers say

### techSampler

[App page](https://appshunter.io/ios/app/techsampler/id626214040)

Explore dozens of free, standalone apps with complete source code for electronics, science, math, and graphics. This companion app to a popular book provides executable projects and programming tools for iPhone and iPad.

**Highlights:** Free standalone apps with source code, Electronics and sensor projects, Data collection and analysis, Interactive graphics and programming, Companion to O'Reilly book, Built-in help and debugger, STEM education tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Editing | $14.99 | one-time |


### Concept

[App page](https://appshunter.io/ios/app/concept-a-new-way-to-learn/id6473735952)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Learning Plan | $14.99 | per month |


## Frequently asked questions

### Is techSampler free?

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

### Is Concept free?

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

### Do techSampler or Concept have ads?

Concept shows ads; techSampler does not.

### Which is updated more often, techSampler or Concept?

techSampler ships an update every 4 months, and Concept every 2 weeks. Most recently, techSampler was updated on October 6, 2026 and Concept on October 10, 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.*