Comparison

RAID Calc2 vs Bookmark Shelf

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

Head to head
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.

About

Bookmark Shelf

This app helps you save, organize, and quickly find web links. You can group them into collections, add tags for easy filtering, and access them across your devices. It offers a free tier with limitations and a premium option for unlimited access and advanced features.

Highlights
  • Save links from any app
  • Organize bookmarks into collections
  • Filter with smart tags
  • PIN-protected hidden collections
  • iCloud sync across Apple devices
  • Export bookmarks to TXT
  • Search and filter functionality
Features
Read full description

Save. Organize. Access Anywhere. BookmarkShelf is the ultimate bookmark manager for iOS. Save links from any app, organize them into collections, and find them instantly with powerful tags. --- Features Bookmark Management Save links from Safari, social media, or any app with our Share Extension. Each bookmark captures the title, description, and thumbnail automatically. • Free: Up to 10 bookmarks • Premium: Unlimited bookmarks Collections Group your bookmarks by project, topic, or anything you like. Create a collection for work, recipes, travel plans, or shopping wishlists. • Free: 1 collection • Premium: Unlimited collections Smart Tags Add colorful tags to your bookmarks for lightning-fast filtering. Find exactly what you need in seconds. • Free: 1 tag • Premium: Unlimited tags Hidden Collections (Premium) Protect your private bookmarks with PIN-protected hidden collections. Your sensitive links stay secure. iCloud Sync (Premium) Access your bookmarks on all your Apple devices. Save on iPhone, browse on iPad - everything stays in sync automatically. Export (Premium) Export your bookmarks to TXT files. Back up your data or share your curated link collections with others. Favorites Mark your most important bookmarks as favorites for quick access. Search & Filter Powerful search across all your bookmarks. Filter by collection, tag, or favorites to find links instantly. Beautiful Dark Mode Designed for iOS with a stunning dark interface that's easy on the eyes. Unlock unlimited bookmarks, collections, and tags. Plus get exclusive features like Hidden Collections, iCloud Sync, and Export. Privacy Policy: https://www.erkansevim.com/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Download BookmarkShelf today and never lose a link again!

Screenshots

RAID Calc23 screens
Bookmark Shelf3 screens

Verdict

The call

The clearest difference is in-app purchases: RAID Calc2 at none against Bookmark Shelf's 3. Bookmark Shelf's advantage is iOS requirement (17.0 vs 26.0). On price, ads 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

Both are free to download. Bookmark Shelf sells 3 in-app purchases, starting at $3.99 per month. RAID Calc2 asks for nothing beyond the download.

Scorecard2 real differences · 7 level
RAID Calc2 versus Bookmark Shelf: the parameters behind the verdict, then further details
ParameterRAID Calc2Bookmark Shelf
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size7 MB15 MB
Age rating12+4+
DeveloperTodd GrecoErkan Sevim

In-app purchases

None

RAID Calc2

No in-app purchases

3 purchases

Bookmark Shelf

Subscriptions2
  • All Access$3.991 Month
  • All Access3 Days trial$14.991 Year
One-time1
  • All Access$24.99

Questions

Is RAID Calc2 free?
RAID Calc2 is free to download, with no in-app purchases.
Is Bookmark Shelf free?
Bookmark Shelf is free to download, with in-app purchases available.
Do RAID Calc2 or Bookmark Shelf have ads?
Neither RAID Calc2 nor Bookmark Shelf shows ads.

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