G4S Nutivõti vs RAID Calc2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
G4S Nutivõti
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G4S Nutivõti is a solution that allows you to control the digital locks of various locations and items with a single app. It is a simple, secure and flexible solution for managing all necessary lock systems. It doesn't matter if it's your home, workplace, office, locker or bike, because all of them can be accessed securely and cost-effectively using the G4S Nutivõti app. Multiple users can be added into the app and thus you can control the employees' access to your business or different departments of it. We do not offer you another lock, we connect the smart locks you already use to our app, so all you need to opena and lock the doors is G4S Nutivõti.
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 iOS requirement: G4S Nutivõti at 15.0 against RAID Calc2's 26.0. 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.
G4S Nutivõti ships an update every 7 months, RAID Calc2 every 5 months. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.
| Parameter | G4S Nutivõti | RAID Calc2 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 7 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 21 MB | 7 MB |
| Age rating | 4+ | 12+ |
| Developer | G4S EESTI AS | Todd Greco |
In-app purchases
G4S Nutivõti
No in-app purchases
RAID Calc2
No in-app purchases









