# Learn XML vs TriStack

The clearest difference is price: Learn XML at Free against TriStack's $6.99. Learn XML also leads on iOS requirement (12.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Learn XML is free to download; TriStack costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn XML ships an update every 4 months, TriStack every 2 months. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Learn XML | TriStack |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 28 MB | 36 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OnePercent](https://appshunter.io/developer/1536020418) | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) |

## What reviewers say

### Learn XML

[App page](https://appshunter.io/ios/app/learn-xml-onepercent/id1561356815)

**Features:** macOS Compatibility

**In-app purchases:** none


### TriStack

[App page](https://appshunter.io/ios/app/tristack/id6743567658)

**In-app purchases:** none


## Frequently asked questions

### Is Learn XML free?

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

### Is TriStack free?

TriStack costs $6.99, with no in-app purchases.

### Do Learn XML or TriStack have ads?

Neither Learn XML nor TriStack shows ads.

### Which is updated more often, Learn XML or TriStack?

Learn XML ships an update every 4 months, and TriStack every 2 months. Most recently, Learn XML was updated on November 11, 2026 and TriStack on November 4, 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.*