OnceOne vs SimplePlan
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
OnceOne
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With OnceOne, you can manage your to-do tasks offline or on multiple devices through iCloud. We provide a powerful filter function to help you quickly locate the task list that meets specific conditions. ## Core Features - To-do management - Custom filter list - Tomato countdown focus - Activity records - Data statistics and chart display Privacy policy:Β https://yindongliang.com/docs/App/OnceOne-Privacy-Policy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SimplePlan
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SimplePlan keeps planning simple and helps you focus on what matters today. There are no overloaded dashboards, complicated systems, or endless settings. Just daily routines, todayβs tasks, and visible progress. When you need a wider view, group related work into projects, plan the next seven days, and manage dates in the calendar. Features: β’ A calm, focused plan for today β’ Projects for related tasks and routines β’ Progress, upcoming plans, and Later items inside each project β’ Seven consecutive days starting today β’ A Later list for ideas and future tasks β’ Daily items for reading, exercise, nutrition, and other routines β’ A calendar with month navigation, date selection, and quick task creation β’ Rescheduling that preserves task history β’ Monthly insights for tasks, fully completed days, and daily routines β’ Consistency for each daily item: completed, skipped, and success rate β’ Morning reminders and timed task notifications β’ Calm design, smooth animations, and accessibility support Your data stays locally on your iPhone. SimplePlan requires no account, contains no ads, and does not track you.
Screenshots
Verdict
The clearest difference is in-app purchases: SimplePlan at none against OnceOne's 3. OnceOne's advantage is update cadence (weekly vs every 2 months) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. OnceOne sells 3 in-app purchases, starting at $0.99 per month. SimplePlan asks for nothing beyond the download.
OnceOne ships an update weekly, SimplePlan every 2 months. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.
| Parameter | OnceOne | SimplePlan |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly β better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad β better | iPhone |
| Requires iOS | 18.0 β better | 26.0 |
| Further details β not scored | ||
| Size | 3 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Dongliang Yin | Ildar Khasanov |
In-app purchases
OnceOne
- Pro(Monthly)$0.991 Month
- Pro(Annual)$9.991 Year
- Pro(Lifetime)$24.99
SimplePlan
No in-app purchases









