Fast Idea Book vs ObSort
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fast Idea Book
Quickly capture fleeting thoughts via text, voice, or photo with a single tap. Access your ideas through widgets, the Share Sheet, or Siri. Organize and review them later, with advanced features unlocked via subscription.
- One-tap text, voice, and photo capture
- Home Screen capture widget
- Share Sheet integration
- On-device voice transcription
- Tags and quick review
- Siri integration
- iCloud sync
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A frictionless capture pad for the ideas you would otherwise lose. If you have ever woken at 3 AM with a great idea and nothing to write it on, or watched a brilliant phrase evaporate while you opened a heavier app, Fast Idea Book is for you. It is a calm, on-device idea book built around one job — capture the thought before it fades — and one principle: never make you wait or sign in. Open the app and you are already typing. Quick notes save with a single keystroke. Brainstorm freely without folder rituals, then tag entries afterward when your brain wants structure. Voice memo capture for hands-free moments, brain-dump templates for foggy mornings, and a search that surfaces the half-remembered note in seconds. Home Screen and Lock Screen widgets keep the latest idea visible, and the interface ships in 39 languages with full accessibility. Built for writers, founders, students, designers and anyone whose best ideas arrive at the worst possible moment.
ObSort
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Extract subjects from photos and sort them by color or size. ObSort: Organize your digital world with ease! Effortlessly lift subjects from any photo, sort them by color or size, and arrange them into stunning new compositions. Discover the joy of perfectly ordered collections, then save and share your unique creations. Unlock advanced features for an even more powerful sorting experience. Privacy Policy: https://sites.google.com/view/privacy-policy-lo-cam Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Fast Idea Book at none against ObSort's 2. ObSort's advantage is update cadence (every 4 days vs monthly). On price, ads, device support and iOS requirement 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. ObSort sells 2 in-app purchases, starting at $1.99 per month. Fast Idea Book asks for nothing beyond the download.
Fast Idea Book ships an update monthly, ObSort every 4 days. Both last shipped on October 30, 2026.
| Parameter | Fast Idea Book | ObSort |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.5 | 17.6 — better |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Bahattin Duran | Hanquan Liang |
In-app purchases
Fast Idea Book
No in-app purchases
ObSort
- ObSort Pro Monthly$1.991 Month
- ObSort Pro Lifetime$4.99
