picocalc vs Rundle
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.
Rundle
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The next thing is already decided. Rundle runs your routine one step at a time, so you are not standing in the kitchen at 7am deciding what happens next. A calm ring counts down. When it ends, the next step is already on screen. Built for how ADHD actually works: • One step at a time. Not the whole list. • A visual countdown you can read from across the room, and on your lock screen. • Park a thought the moment it interrupts you, and come back to it when you are done. • See the week you actually had. No streaks to protect, no guilt for the days you missed. Every routine is free. All of them. There is no cap and no upsell in the middle of your morning. The one time upgrade adds routine reminders and every theme. No subscription. No account. No ads. No AI. Your data stays on your device and syncs privately through your own iCloud. There is no server, so there is nothing for us to see. Accessibility is not an afterthought: • Full VoiceOver in the routine runner • Dynamic Type up to the largest accessibility sizes • Reduce Motion honored • Haptics can be switched off
Screenshots
Verdict
The clearest difference is ads: Rundle at none against picocalc's shown. picocalc's advantage is device support (4 vs 1). On price, in-app purchases 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. picocalc sells 1 one-off in-app purchase and Rundle sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | picocalc | Rundle |
|---|---|---|
| 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 | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch, Vision Pro — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Akamatsu | ONUR YAVUZ |
In-app purchases
picocalc
- Remove Ads$0.99
Rundle
- Rundle Pro$19.99









