# RAID Calc2 vs Simple Mind Tree

The clearest difference is iOS requirement: Simple Mind Tree at 15.1 against RAID Calc2's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RAID Calc2 ships an update every 2 weeks, Simple Mind Tree weekly. The most recent releases landed on September 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | RAID Calc2 | Simple Mind Tree |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 13 MB | 30 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Todd Greco](https://appshunter.io/developer/395601656) | [Cheonsoo Park](https://appshunter.io/developer/1546728209) |

## What reviewers say

### RAID Calc2

[App page](https://appshunter.io/ios/app/raid-calc2/id6755641457)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Mind Tree

[App page](https://appshunter.io/ios/app/simple-mind-tree/id6759855090)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RAID Calc2 free?

RAID Calc2 is free to download, with no in-app purchases.

### Is Simple Mind Tree free?

Simple Mind Tree is free to download, with no in-app purchases.

### Do RAID Calc2 or Simple Mind Tree have ads?

Neither RAID Calc2 nor Simple Mind Tree shows ads.

### Which is updated more often, RAID Calc2 or Simple Mind Tree?

RAID Calc2 ships an update every 2 weeks, and Simple Mind Tree weekly. Most recently, RAID Calc2 was updated on September 11, 2026 and Simple Mind Tree on September 17, 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.*