Comparison

Sync vs Filum

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

Head to head
About

Sync

Securely store, access, and share your files with end-to-end encryption. This cloud storage solution allows you to sync data across all your devices and collaborate with others through shared folders. Protect your sensitive information with robust privacy features.

Highlights
  • 5 GB free secure cloud storage
  • Access files from any device
  • Secure file sharing via links
  • Collaborate with shared folders
  • End-to-end encryption
  • Access controls
Features
Read full description

Sync’s encrypted cloud storage keeps your files safe, secure and private. Access your files from all of your computers and devices easily, and share your files securely with anyone. Features: * Get 5 GB of secure cloud storage free * Access files stored on any computer or device, from your phone or tablet * Upload your photos and videos to Sync * Send large files easily with links * Collaborate and share with teams through shared folders * Protect your files with built-in encryption and access controls How Sync protects your privacy: Sync's end-to-end encrypted cloud storage ensures that only you can access your data. We can't read your files - nor would we want to - ensuring that your documents, photos and videos are safeguarded from unauthorized access. We'd love your feedback! Contact us using the support link below.

About

Filum

Securely scan, organize, and manage important personal documents with on-device AI. It automatically categorizes files, extracts key information, and provides timely renewal reminders for items like passports and visas. Access your encrypted documents easily for offline use or when needed for uploads.

Highlights
  • On-device AI document scanning and categorization
  • Automatic extraction of dates and key information
  • Offline searchable document vault
  • End-to-end encryption on your device
  • Expiry and renewal reminders
  • Document export and recovery phrase
  • Integration with iPhone's document picker
Features
Read full description

Your documents, cached and sealed. Filum is a vault for the documents you can't afford to lose — passports, IDs, residence permits, tax forms, leases, medical and vet records. Scan them once. Filum does the rest. IT FILES ITSELF Snap a document and on-device AI reads it, sorts it by type, and pulls out the dates and numbers that matter. A passport becomes a passport. A lease becomes a lease. Everything becomes searchable — instantly, even offline. ENCRYPTION HAPPENS ON YOUR DEVICE Every file is encrypted with AES-256-GCM on your iPhone before it syncs. Your keys are derived in the Secure Enclave and never sent to our servers. We store ciphertext and nothing else. WHAT WE CAN'T SEE - Your documents — never - Filenames, types, or extracted fields — never - Your encryption key — never All we hold are encrypted blobs and the sizes and timestamps needed to sync them. EXPIRY RADAR Filum tracks renewals — passports, visas, residence permits, insurance — and warns you before they lapse. It counts to the six-month validity rule most destinations enforce, not the date printed on the document. BUILT FOR PEOPLE WITH PAPERWORK IN MORE THAN ONE COUNTRY Moving abroad means residence permits, apostilles, translated certificates, pet passports, and forms from two tax authorities. Filum keeps all of it in one place, files it automatically, and puts it in your iPhone's document picker — so when a government portal asks you to upload proof, it's two taps away. YOURS TO KEEP Export your entire vault any time. No lock-in. The only way back into your vault is a 24-word recovery phrase that belongs to you alone — we can't recover it for you, and that's exactly the point. OPEN CORE Filum's encryption core is open source under MIT. Read it instead of taking our word: github.com/CorvidSoft/filum-crypto PRIVACY POLICY: filumapp.com/privacy TERMS OF SERVICE: filumapp.com/terms

Screenshots

Sync4 screens
Filum4 screens

Verdict

The call

The clearest difference is review sentiment: Filum at 100% against Sync's 51%. Filum also leads on rating (5.0 vs 4.2). Sync's advantage is in-app purchases (none vs 2) and ratings volume (830 vs 3). On price, update cadence and ads 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. Filum sells 2 in-app purchases, starting at $4.99 per month. Sync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Filum holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Sync has 830 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 51% of Sync's written reviews are positive against 100% of Filum's.

UpkeepUpdate frequency

Sync ships an update monthly, Filum every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
Sync versus Filum: the parameters behind the verdict, then further details
ParameterSyncFilum
PriceFreeFree
Rating4.2 (830 ratings)5.0 (3 ratings) — better
Positive reviews51.2% of reviews100.0% of reviews — better
Number of ratings830 — better3
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better26.0
Further details — not scored
Size53 MB59 MB
Age rating4+17+
DeveloperSync.com Inc.CorvidSoft

Customer experience

Sync

All ratings821 ratings
Positive77.6%
Neutral4.4%
Negative18.0%
Written reviews523 reviews
Positive51.2%
Neutral9.4%
Negative39.4%

Filum

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Sync

Reported bugs

5 issues
  • Unreliable camera roll backup
  • Inconsistent file sync across devices
  • Frequent app crashes and freezes
  • Inability to access offline files
  • Sync issues when switching devices

Requested features

5 requests
  • Improved iOS app integration with Files app
  • Video playback and streaming support
  • Bulk file management (rename, move, delete)
  • Advanced sharing options and controls
  • Better background sync for photos/videos

Filum

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sync

No in-app purchases

2 purchases

Filum

Subscriptions2
  • Filum Pro Monthly$4.991 Month
  • Filum Pro Yearly$39.991 Year

Questions

Is Sync free?
Sync is free to download, with no in-app purchases.
Is Filum free?
Filum is free to download, with in-app purchases available.
Which has better reviews, Sync or Filum?
Filum is rated higher. Sync averages 4.2 out of 5 from 830 ratings, while Filum averages 5.0 from 3 ratings.
Do Sync or Filum have ads?
Neither Sync nor Filum shows ads.
Which is updated more often, Sync or Filum?
Sync ships an update monthly, and Filum every 3 weeks. Most recently, Sync was updated on October 26, 2026 and Filum on October 25, 2026.

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