Comparison

Möbius Sync vs rotblock

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

Head to head
About

Möbius Sync

Synchronize files between your iOS devices and other Syncthing-supported platforms without relying on cloud storage. Manage multiple folders and remote devices, with options for sandbox or experimental cross-app sandbox syncing.

Highlights
  • File synchronization between iOS and other Syncthing devices
  • No cloud service required
  • Supports multiple folders and remote devices
  • Sync within app sandbox or other app sandboxes (paid)
  • Uses open-source Syncthing engine
Features
Read full description

Möbius Sync brings Syncthing to your iPhone or iPad, allowing you to synchronize selected files between iOS devices and other devices supported by Syncthing, without the need for any cloud service. Supports multiple folders and multiple remote devices. Synchronized folders can be created either: 1. in the Möbius Sync sandbox and files can be added to and retrieved from shared folders via the iOS Files app; or 2. (PAID feature) by accessing other apps' sandboxes. This feature is EXPERIMENTAL and may break other app's functionality. Uses the open-source Syncthing engine internally. Usage within the Möbius Sync sandbox is free up to 20MB. Unlimited file sync, including files in other apps' sanboxes is available for a one-time purchase. NOTE: The functionality unlocked by in-app purchase is identical to that in Möbius Sync Pro (which is purchased up-front).

About

rotblock

Features
Read full description

Doomscrolling is easy. rotblock makes it cost a thought. Pick the apps and websites that steal your time. When you try to open one, rotblock steps in: solve a short learning challenge and the app unlocks for the minutes you chose. Then it locks again. You still get your apps, you just earn them, and you learn something every time. HOW IT WORKS • Choose apps and sites with Apple's Screen Time picker • Set a rule per app: which challenge, how many questions, how many minutes • Open a locked app, solve, get your time • Emergency unlock when you really need it (with a short wait) CHALLENGES THAT TEACH • Math that adapts to your level • Flashcards: answer by typing, by voice or by handwriting • Reading comprehension with short passages • Chess puzzles and a learning path • Languages: Spanish, French, German, Italian, Portuguese, Arabic and Chinese, including writing Arabic letters and Chinese characters by hand • Coding: concepts plus Python, JavaScript/TypeScript, C, C++, Go, Rust and ARM64 • Physics and history A BRAIN THAT GROWS WITH YOU Every solved challenge feeds your pixel-art brain. It evolves from a tiny mush into a gym brain and keeps going, with crowns, auras and looks from the Brain Shop and free gift packs. RULES THAT STICK • Daily open limits per app • Timer mode: wait it out instead of solving • Study hours and a nightly wind-down schedule • Priming: a short breathing, gratitude and intention routine before you scroll • Block adult websites with Apple's content filter • A guide to turning on grayscale TRACK YOUR PROGRESS Take the Quick check or the Full test and watch your estimated IQ, speed, memory and reasoning change over time. The IQ score is an estimate for tracking your own progress. It is not a clinical or diagnostic IQ assessment. FRIENDS (PRO) Add friends with a code or QR, compare streaks, duel on challenges and trade brain cosmetics. AI TUTOR Pick any topic and get a course researched and taught step by step, with readings, flashcards and practice. One-time €29 add-on, requires Pro. WIDGETS Your brain, your streak, your level and your locked apps on the Home Screen. Tap to practice. PRIVATE BY DESIGN • The apps you lock stay on your device. rotblock only gets anonymous tokens from Screen Time and never learns which apps they are. • No ads, no tracking, no third-party analytics. • Handwriting is read on your device. Voice answers use on-device speech recognition where your iPhone supports it. • An account is optional (Sign in with Apple) and only needed for the leaderboard, friends and cloud backup. ROTBLOCK PRO Free: app and website blocking, math, flashcards (one custom deck plus the starter decks) and reading, and your first IQ test. Pro unlocks every challenge type, unlimited decks, schedules, priming and IQ retests. Try Pro free for 7 days, then €99 per year or €29 per month (prices may vary by country). Payment is charged to your Apple Account when the trial ends. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://rotblock.org/privacy Requires Screen Time access. Made in Austria by WMB GmbH.

Screenshots

Möbius Sync1 screens
rotblock4 screens

Verdict

The call

The clearest difference is device support: Möbius Sync at 3 against rotblock's 1. Möbius Sync also leads on iOS requirement (14.1 vs 26.0). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Möbius Sync sells 1 one-off in-app purchase and rotblock sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Möbius Sync versus rotblock: the parameters behind the verdict, then further details
ParameterMöbius Syncrotblock
PriceFreeFree
Rating3.8 (140 ratings) — better—
Positive reviews55.0% of reviews—
Number of ratings140 — better—
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.1 — better26.0
Further details — not scored
Size23 MB37 MB
Age rating4+4+
DeveloperPickup Infinity LimitedWMB GmbH

Bugs and requests

Möbius Sync

Reported bugs

16 issues
  • Syncthing version incompatibility with v2.x devices
  • Device discovery limited to 1 of 5 paired devices
  • Insufficient space errors despite available storage
  • Purchase dialog rendering issues on older devices
  • Purchase not persisting after app reinstall
Show 11 more
  • Settings reset after app updates
  • External folder bookmark path cannot be changed
  • .stfolder sync failures and naming conflicts
  • Sync hangs at intermediate percentages
  • Files not appearing in designated folders despite sync confirmation
  • App crashes and becomes unresponsive
  • Language preference not saved between sessions
  • Syncthing disabled errors with no explanation
  • Quick Sync feature not working reliably
  • Accessibility issues with VoiceOver
  • App storage consuming excessive disk space (10GB+)

Requested features

15 requests
  • Update internal Syncthing to version 2.x or higher
  • iOS Photos app sync capability (at least one-way upload)
  • True background synchronization
  • Selective folder sync to save storage space
  • File Provider extension for deeper iOS integration
Show 10 more
  • Widget for continuous background operation
  • Photo library backup functionality
  • Family sharing support for purchases
  • Better UI/UX with custom frontend instead of web interface
  • Automatic sync without manual app opening
  • Support for untrusted devices
  • Folder encryption support
  • Location-based sync triggers
  • More frequent Syncthing core updates
  • Better documentation and setup guides

rotblock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Möbius Sync

One-time1
  • Unlimited file sync$4.99
10 purchases

rotblock

One-time10
  • Heart$0.99
  • Lightning$0.99
  • Lab coat$1.99
Show 7 more
  • Owl$2.99
  • Dragon$2.99
  • Dog$2.99
  • Axolotl$2.99
  • Robot$2.99
  • Starter pack$3.99
  • All pets$8.99

Questions

Is Möbius Sync free?
Möbius Sync is free to download, with in-app purchases available.
Is rotblock free?
rotblock is free to download, with in-app purchases available.
Do Möbius Sync or rotblock have ads?
Neither Möbius Sync nor rotblock shows ads.

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