Azure Map vs RAID Calc2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Azure Map
Instantly overlay the 24 Mountains onto any map to locate Qi points, water, or "Sha Qi". This tool automatically aligns with North for precise placement, serving as a valuable companion for Feng Shui audits.
- Overlay 24 Mountains on maps
- Locate Qi mouth, water, and Sha Qi
- Automatic North alignment
- Companion Lou Pan compass
- Works on iPhone and iPad
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Forget about messy templates, transparencies and papers. The fourth tool of the Azure series enables you to instantly overlay the 24 Mountains anywhere on the map. Use this tool to locate the Qi mouth, mountains, water or even "Sha Qi". Both the 24 Mountains and the base map aligns automatically to the North so you don't have to worry. This app works also works on iPhone, but works superbly on big screen iPad. There is also an accompanying Lou Pan compass for general purpose use. This is definitely a great companion tool for your Feng Shui audit.
RAID Calc2
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RAID Calc2 is retiring. It leaves the App Store on December 31, 2026. It keeps working on your device after that, but won’t get updates. Its successor is RAID Calculator, from the same developer. It’s the same calculator, plus NAS planning for Synology SHR, Unraid, ZFS, SnapRAID and Btrfs, RAID 50 and 60, and RAID-Z. Search the App Store for “RAID Calculator”, or tap the banner in the app. UNTIL THEN, RAID CALC2 STILL DOES THE JOB • RAID 0, 1, 5, 6, 10 and JBOD • Usable and raw capacity, and how efficient the layout is • What the space will show as in TiB, the binary units most systems report • A drive strip showing which drives hold data, parity or mirrors • How many drive failures the array survives • Speed and availability ratings, with a plain-language guide to every level • A caution before a risky rebuild on large drives, with a one-tap switch to RAID 6 • One-tap fixes when the drive count doesn’t suit the level ON EVERY SCREEN • On iPad, and on iPhone Duo opened in landscape, results sit beside inputs • Rotates to landscape on iPhone • Built for iOS 26 with native controls and Liquid Glass • Dark mode, Dynamic Type at every size, and full VoiceOver support • In English, Spanish, French, Italian, Japanese, German, Traditional and Simplified Chinese, Korean and Brazilian Portuguese PRIVATE No accounts, no tracking, no ads. Everything stays on your device. Not affiliated with or endorsed by Synology Inc. Synology and SHR are trademarks of Synology Inc. Not affiliated with or endorsed by Lime Technology, Inc. Unraid is a trademark of Lime Technology, Inc. ZFS is a trademark of Oracle and/or its affiliates. Not affiliated with or endorsed by Oracle.
Screenshots
Verdict
The clearest difference is price: RAID Calc2 at Free against Azure Map's $1.99. Azure Map's advantage is iOS requirement (13.0 vs 26.0). On update cadence, ads, in-app purchases and device support 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
RAID Calc2 is free to download; Azure Map costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Azure Map ships an update every 3 months, RAID Calc2 every 5 months. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.
| Parameter | Azure Map | RAID Calc2 |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 11 MB | 7 MB |
| Age rating | 4+ | 12+ |
| Developer | Jason Chin | Todd Greco |
In-app purchases
Azure Map
No in-app purchases
RAID Calc2
No in-app purchases









