RAID Calc2 vs Simple Mind Tree
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RAID Calc2
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Understand your RAID before you build it. RAID Calculator gives you quick, accurate estimates of usable capacity and redundancy for common RAID levels. Whether you’re planning a homelab, sizing storage for a small office, or just learning how RAID works, this simple calculator helps you reason about your arrays in seconds. Features • Supports common RAID levels (e.g., RAID 0, 1, 5, 6, 10)* • Enter disk size and disk count to see usable capacity • See how many drive failures your configuration can tolerate • Works completely offline – no accounts, no analytics, no ads • Clean, focused UI with instant results Privacy-friendly by design All calculations run locally on your device. RAID Calculator doesn’t collect personal data, use trackers, or send your RAID configurations anywhere. Who is it for? • Homelab and NAS enthusiasts • IT admins and sysadmins • Students learning about storage and redundancy • Anyone who wants a quick RAID sanity check Plan your arrays with more confidence and less guesswork.
Simple Mind Tree
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Brainstorm anytime, anywhere — whether you're organizing your thoughts or seeking creative ideas in a meeting.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | RAID Calc2 | Simple Mind Tree |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 13 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Todd Greco | Cheonsoo Park |
In-app purchases
RAID Calc2
No in-app purchases
Simple Mind Tree
No in-app purchases
Questions
Is RAID Calc2 free?
Is Simple Mind Tree free?
Do RAID Calc2 or Simple Mind Tree have ads?
Which is updated more often, RAID Calc2 or Simple Mind Tree?
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