# Tech vs Java Data Structures & Algo

The clearest difference is iOS requirement: Tech at 15.1 against Java Data Structures & Algo's 17.0. 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.

## The numbers

| Metric | Tech | Java Data Structures & Algo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 34 MB | 18 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [FaireNow](https://appshunter.io/developer/1796243447) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Tech

[App page](https://appshunter.io/ios/app/tech-stack/id6743924860)

**Features:** macOS Compatibility

**In-app purchases:** none


### Java Data Structures & Algo

[App page](https://appshunter.io/ios/app/java-data-structures-and-algo/id6756706722)

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

**In-app purchases:** none


## Frequently asked questions

### Is Tech free?

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

### Is Java Data Structures & Algo free?

Java Data Structures & Algo is free to download, with no in-app purchases.

### Do Tech or Java Data Structures & Algo have ads?

Neither Tech nor Java Data Structures & Algo shows ads.

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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.*