Sharp vs PurePaper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sharp
This app transforms your daily journal entries into unique AI-generated artwork. It uses on-device AI for emotion analysis and character reactions, ensuring your personal thoughts remain private. Build a consistent writing habit with engaging feedback and illustrations.
- AI-generated illustrations from diary entries
- On-device AI for privacy
- Emotion analysis of journal content
- Interactive AI character reactions
- Helps build a writing habit
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AI turns your day into art — your own safe, private picture diary. Sharp is a picture diary app where AI illustrates your entries with beautiful artwork. Emotion analysis and character reactions are powered by Apple's on-device AI, so your diary never leaves your device. ■ AI Picture Diary AI creates expressive illustrations based on your diary entries. Build your own unique picture diary, one day at a time. ■ On-Device AI · Complete Privacy Emotion analysis and character reactions are processed entirely on your device using Apple's on-device AI technology. Your diary content is never sent to external servers. Illustration generation optionally uses cloud AI. ■ Cute AI Character Reactions 5 unique AI characters react to your diary over time. From warm comfort to honest advice, experience empathy like chatting with real friends. ■ Emotion Analysis AI automatically analyzes the emotions in your diary, helping you understand your emotional patterns. ■ Build a Writing Habit The reward loop of character reactions and illustrations helps you build a consistent journaling habit. Best experience on iPhone 15 Pro and later.
PurePaper
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PurePaper is a high-end document scanning tool for people who value aesthetics and efficiency. A tool should stay out of the way—it shouldn’t track you, require a subscription, or upload your private documents to someone else’s server. [CORE FEATURES] • The “Flatbed Look”: Adaptive shadow removal clears uneven lighting and restores a clean white background. • Precision warping: System document edge detection and perspective correction straighten skewed photos into rectangular pages. • Text sharpening: Boosts contrast for handwriting, stamps, and print. • Four core modes: Magic Color, Flatbed Look, B&W Document, and Original Photo. • On-device OCR & full-text search: Chinese (Simplified/Traditional), English, Japanese, German; search titles and page content from Home. • Searchable PDF: Optional invisible text layer. Enabled by default for PDF export; disable in Export for image-only PDFs. • Sign, annotate & redact: PencilKit markup; redact sensitive text automatically or by hand. • Tags & merge: Colored tags; merge multiple documents into one multi-page file. • App Lock: On by default. Face ID, Touch ID, or device passcode is required on launch and when returning from the background. To turn it off: Settings → App Lock → disable “Require Face ID / Passcode”. [OPTIONAL — OFF BY DEFAULT] • Backup Destination: Settings → Backup Destination. Default is Local Only. Switch to iCloud Drive or your own WebDAV server to back up exports. [WHY PUREPAPER?] • Ultra-minimal native UI—no clutter, just scanning. • Anti-subscription: one-time purchase, lifetime ownership. • Native Swift stack for fast launch and processing.
Screenshots
Verdict
The clearest difference is update cadence: Sharp at every 4 days against PurePaper's every 2 months. PurePaper's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sharp ships an update every 4 days, PurePaper every 2 months. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | Sharp | PurePaper |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | OKMIN LEE | 宇航 吴 |
In-app purchases
Sharp
No in-app purchases
PurePaper
No in-app purchases









