NULL Memo vs AI Inbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NULL Memo
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NULL Memo is a quick capture tool for notes, lists, and memos—simple, ad-free, and free from endless customization. It focuses on what matters most: writing something down before you forget it. ■ BUILT LIKE A REAL TOOL It avoids feature bloat and smart automation, focusing on fast capture and simple organization. Straightforward, consistent, and reliable. ■ STAYS NEAT IN ANY SCENARIO Use it for anything—notes, ideas, to-do lists, shopping lists, reminders. Whatever you put in, the layout stays structured and readable, so pages never feel messy. ■ ORGANIZE WITH PAGES Create pages to separate your contexts (work, personal, shopping, ideas, etc.). It's a lightweight organization that keeps things tidy without turning into a whole system you have to manage. ■ OFFLINE Your memos are stored locally on your device for instant access and control. No ads. No accounts. Just your notes, where they belong. ■ CALM, RESTRAINED VISUALS The design is intentionally quiet and minimal. It’s made to remove unnecessary distractions and stimulation, and focuses on achieving only a single purpose. Never lose a thought again.
AI Inbox
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AI Inbox: Screenshot Actions helps you turn captured information into something you can actually use. Import a screenshot or paste text, run on-device OCR for images, then let AI extract useful cards such as tasks, reminders, money items, ideas, and references. Review each card before it becomes part of your searchable personal library. Designed as a local-first productivity inbox: - Manual screenshot/photo import - Paste text or links - On-device OCR using Apple Vision - Local extraction fallback by default - Optional AI extraction through a user-provided HTTPS backend - AI Inbox Pro Monthly with 1000 hosted AI credits/month - Local fallback and BYO backend processing remain free - Review, confirm, edit, archive, and search cards - Today view for dated tasks and reminders - Local notification support for confirmed reminder cards - Privacy-first MVP: no account, no cloud sync, no embedded model keys Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: AI Inbox at none against NULL Memo's 1. 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. NULL Memo sells 1 one-off in-app purchase. AI Inbox asks for nothing beyond the download.
| Parameter | NULL Memo | AI Inbox |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 60 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Aaron Chan | Yui Pan YAU |
In-app purchases
NULL Memo
- NULL Memo Pro$2.99
AI Inbox
No in-app purchases









