# STL Viewer vs Mind Map

The clearest difference is price: STL Viewer at Free against Mind Map's $1.99. Mind Map's advantage is update cadence (monthly vs every 43 months) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

STL Viewer is free to download; Mind Map costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

STL Viewer ships an update every 43 months, Mind Map monthly. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | STL Viewer | Mind Map |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 43 months | **Monthly** |
| Monetization | — | Paid |
| Size | 4 MB | 24 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Felipe Marques de Barros](https://appshunter.io/developer/1459294806) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### STL Viewer

[App page](https://appshunter.io/ios/app/stl-viewer/id6445801487)

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

**In-app purchases:** none


### Mind Map

[App page](https://appshunter.io/ios/app/mind-map-brainstorm-outline/id6767079824)

Visually organize your thoughts and plans with a variety of professional diagram styles. This tool offers templates and a blank canvas for brainstorming, project planning, and note-taking, all without needing an account. Your work is stored locally for privacy and offline access.

**Highlights:** Eight diagram types, Template library, My Maps hub, Offline-first functionality, Clean interface, No account required

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

**In-app purchases:** none


## Frequently asked questions

### Is STL Viewer free?

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

### Is Mind Map free?

Mind Map costs $1.99, with no in-app purchases.

### Do STL Viewer or Mind Map have ads?

Neither STL Viewer nor Mind Map shows ads.

### Which is updated more often, STL Viewer or Mind Map?

STL Viewer ships an update every 43 months, and Mind Map monthly. Most recently, STL Viewer was updated on October 8, 2026 and Mind Map on October 1, 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.*