picocalc vs otu.ai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
picocalc
This app displays a single number on your home screen badge, which can be set, added to, or subtracted from. It's a minimalist tool for quick numerical reminders. Negative numbers and zero are not displayed on the badge.
- Set a number
- Add to number
- Subtract from number
- Home screen badge display
- Hides zero and negative numbers
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picocalc is a tiny number memo which can be set, added and subtracted. The number is show as an application badge in the home screen. Zero and a negative number won't be shown in the badge.
otu.ai
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OTU: Your AI-Powered Cross-Platform Memo App Capture your thoughts seamlessly and find them instantly, wherever you are. Key Features - Cross-Platform Access: Enjoy a consistent experience across all your devices. - AI Chatbot: Get instant answers based on your saved memos. - Advanced Editing Tools: Edit with the power of a word processor. - Quick Capture: Jot down ideas before they slip away. - Auto-Generated Titles: Save time with smart, automated titles. - Text Extraction from Images: Turn images into searchable memos. OTU is more than just a memo app. It’s designed to help you store effortlessly and retrieve effectively, enhanced by AI. Start your new memo journey with OTU today!
Screenshots
Verdict
The clearest difference is ads: otu.ai at none against picocalc's shown. otu.ai also leads on update cadence (fortnightly vs every 31 months) and iOS requirement (15.1 vs 17.6). picocalc's advantage is device support (4 vs 2). On price and in-app purchases 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. picocalc sells 1 one-off in-app purchase and otu.ai sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
picocalc ships an update every 31 months, otu.ai fortnightly. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.
| Parameter | picocalc | otu.ai |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 65.6% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 31 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch, Vision Pro — better | iPhone, iPod |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Akamatsu | opentutorials |
In-app purchases
picocalc
- Remove Ads$0.99
otu.ai
- Monthly Subscription$4.991 Month
- Yearly Subscription$44.991 Year
