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String Utility Belt vs RejectProof

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

String Utility Belt compared with RejectProof
DetailString Utility Belt logo String Utility BeltRejectProof logo RejectProof
What it doesFree online string and text tools for encoding, decoding, hashing, formatting and converting text in your browser Find out why Apple will reject your app before you submit
StageNot given Not given
FoundedNot given Not given
Based inNot given TR
Pricing modelFree Paid
PricingNot given Free: 10-question metadata review with no account. One app: $12 for full 54-point scan with 3 days of unlimited re-scans. Five apps: $39 ($7.80 each) for 5 credits. Studio: $99 for 20 apps ($4.95 each). One-time payment, no subscription. All prices exclude VAT.
Key features
  • Base64 encoding and decoding
  • URL encoding and decoding
  • JSON formatting, validation and minifying
  • JWT decoding with readable timestamps
  • SHA-256 and other cryptographic hashing
  • UUID generation with multiple versions
  • Text diffing with multiple formats
  • Chainable pipelines with live preview
  • CSV to JSON and JSON to YAML conversion
  • Regular expression explanation in plain English
  • 54-point binary and metadata checks covering privacy, runtime, app completeness and provisioning
  • Each issue includes guideline number, evidence and plain-English fix
  • Support for Expo, Xcode, Rork, a0 and Bolt builds
  • Privacy-first approach with JSON-only server communication
  • Rejection guarantee refund if approved app marked as passing fails review
What makes it different
  • All processing happens in your browser with no data uploaded to servers
  • Chain multiple tools into pipelines with live preview of each step
  • Available across VS Code, CLI, MCP and as a Node.js library
  • No cookies or tracking scripts, privacy-focused
  • 248 utilities organized by category with guides and worked examples
  • One-time payment per app with no subscription
  • Unlimited re-scans for 3 days after purchase to verify fixes
  • Built by an iOS developer with focus on preventing avoidable rejections
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)38 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)53
Citation Flow (Majestic)2415
Referring domains (Majestic)188

4 details filled in for both companies.

More alternatives to String Utility Belt More alternatives to RejectProof

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