Comparison

Azure Pro vs RAID Calc2

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Azure Pro

This professional tool combines two popular Feng Shui systems, San Yuan Xuan Kong Flying Star and Eight Mansion, into a single app. It functions as a powerful Feng Shui compass, allowing users to instantly plot property charts, forecast annual luck, and maximize potential.

Highlights
  • San Yuan Xuan Kong Flying Star analysis
  • Eight Mansion Feng Shui analysis
  • Instant property chart plotting
  • Annual Flying Star display
  • Luck forecasting
  • Annual activation planning
Features
Read full description

The third of the Azure series of mobile Feng Shui combines the two of the most popular Feng Shui system into one professional app - San Yuan Xuan Kong Flying Star (玄空飞星) and Eight Mansion (八宅). This elegantly-designed professional app turns your iPhone into a powerful Feng Shui compass. You can now plot both the Flying Star and Eight Mansion of any property instantly. In addition to that, this app also show you the annual Flying Star of the property.  Use it to take the necessary pre-cautions or maximise the potential of your property every year. Or use it to forecast the occupant's luck for the coming year, or even for case study of the previous years. You can also use it for your annual activations. The Flying star is one of the many formulas used by practitioners around the world. The Flying Star is also known as the San Yuan Xuan Kong Flying Star formula. The San Yuan system gives emphasis on the timing of Feng Shui. Every property also has a fixed "natal" Flying Star chart. This is how the annual Flying Star affects the residents of a property differently every year. Xuan Kong Flying Star Star is written as 玄空飞星 in Chinese. The Eight Mansion Feng Shui another popular formula used by practitioners around the world. It is used mainly to position a property’s main door, bedroom, study room and kitchen. Eight Mansion is also called Ba Zhai - 八宅 in Chinese. This formula deals primarily with the interior of a property and it maps out the basic qi energy of the property. As this represents the underlying energy, this formula is best suited for use over the longer term such as a family house.

About

RAID Calc2

Features
Read full description

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

Azure Pro4 screens
RAID Calc23 screens

Verdict

The call

The clearest difference is price: RAID Calc2 at Free against Azure Pro's $9.99. Azure Pro'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

CostPrice · In-app purchases · Ads · Monetization

RAID Calc2 is free to download; Azure Pro costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Azure Pro ships an update every 4 months, RAID Calc2 every 5 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 6 level
Azure Pro versus RAID Calc2: the parameters behind the verdict, then further details
ParameterAzure ProRAID Calc2
Price$9.99Free — better
Positive reviews0.0% of reviews—
Update frequencyEvery 4 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better26.0
Further details — not scored
Size18 MB7 MB
Age rating4+12+
DeveloperJason ChinTodd Greco

In-app purchases

None

Azure Pro

No in-app purchases

None

RAID Calc2

No in-app purchases

Questions

Is Azure Pro free?
Azure Pro costs $9.99, with no in-app purchases.
Is RAID Calc2 free?
RAID Calc2 is free to download, with no in-app purchases.
Do Azure Pro or RAID Calc2 have ads?
Neither Azure Pro nor RAID Calc2 shows ads.
Which is updated more often, Azure Pro or RAID Calc2?
Azure Pro ships an update every 4 months, and RAID Calc2 every 5 months. Most recently, Azure Pro was updated on October 26, 2026 and RAID Calc2 on October 25, 2026.

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