O vs Checklist Ultra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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Checklist Ultra
Organize tasks with topics, folders, and tags for quick scanning. Set reminders and sync with your calendar. Collaborate in real-time and create recurring routines.
- Organize with Topics, Folders, and Tags
- Push notifications and alarm reminders
- Calendar sync
- Real-time collaboration
- Recurring routines with progress reports
- Filter tasks in one tap
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Checklist Ultra is the ultra-simple way to plan, remember, and finish—solo or together. Turn any messy to-do list into clear Topics you can scan in seconds. Because the goal isn’t more lists—it’s more time for what matters. WHY IT’S DIFFERENT • Organize instantly: Topics + Folders + Tags (filter in one tap) • Never miss a thing: push notifications + alarm-style reminders • Calendar sync: see tasks alongside your schedule • Real-time collaboration: share a topic and check off together • Routines that reset: daily/weekly/monthly repeats, progress, and reports From groceries to projects, Checklist Ultra is a 10x upgrade over plain checklists. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: O at none against Checklist Ultra's 3. O also leads on ads (none vs shown) and iOS requirement (15.5 vs 17.0). Checklist Ultra's advantage is update cadence (every 3 days vs every 3 weeks). On price 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. Checklist Ultra sells 3 in-app purchases, starting at $1.99 per month. O asks for nothing beyond the download.
O ships an update every 3 weeks, Checklist Ultra every 3 days. The most recent releases landed on September 8, 2026 and June 1, 2026 respectively.
| Parameter | O | Checklist Ultra |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | O-TECH JAPAN | Native |
In-app purchases
O
No in-app purchases
Checklist Ultra
- Plus Monthly$1.991 Month
- Plus Yearly$7.991 Year
- Plus Lifetime$12.99
