PlanGTD vs Atomic Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PlanGTD
Organize your life and build good habits with this intuitive planning tool. Easily manage tasks, projects, and events, and collaborate with others. Enjoy offline access and a built-in Markdown editor for documentation.
- Task and project management
- Habit creation and tracking
- Project sharing and collaboration
- Offline mode for task access
- Built-in Markdown editor
- Apple Watch support
- Multiple themes
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For individuals and companies. Plan and Get Things Done. Create good habits and remember everything! Don't spend time on complicated tools. PlanGTD makes it easy to plan your days and have a more organized (and better) life! Share projects with friends to plan an event or with your significant other (example: groceries, ...) or with co-workers to work on a project. Offline mode is available so you can still see/create/update your tasks/items even if you don't have an internet access (Once you have internet, the data is synchronized). Built-in Markdown editor for elegant documentations! Apple Watch support! Multiple themes to choose from! Premium version: Upgrade to a Premium subscription to remove ads and be able to add attachments (up to 1GB). The premium subscription costs will be applied to your iTunes account. Subscriptions will automatically renew unless canceled within 24-hours before the end of the current period. You can cancel anytime with your iTunes account settings. For more information, see https://www.plangtd.com/terms_of_service_ios and https://www.plangtd.com/privacy_policy.
Atomic Calendar
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Plan Confidently. Stay Organized. Stay Private. Atomic Calendar, part of the Atomic Blend suite, is your privacy-first calendar designed to organize your schedule, protect your data, and keep your life in sync — all secured with end-to-end encryption. Why Atomic Calendar? – End-to-End Encrypted Events – Your events, titles, notes, and attendees are encrypted so only you can access them. – Private by Default – No tracking, no profiling, no behavioral analytics. Your schedule stays yours. – Simple & Focused Design – A fast, distraction-free interface to plan without friction. – Powerful Organization – Multiple calendars, color labels, search, and smart views to stay on top of your time. – Secure Sync Across Devices – Access your calendar everywhere while keeping your data private. – Works with your own self-hosted server or Atomic Blend Cloud. From daily planning to long-term projects, Atomic Calendar helps you stay organized with clarity — without sacrificing your privacy or control. --- About Atomic Blend Atomic Blend is a privacy-first, 100% open-source app suite that includes Atomic Task, Atomic Notes, Atomic Mail, Atomic Calendar, and more — all designed to work together seamlessly. Built for people who value simplicity, transparency, and control, Atomic Blend is your alternative to bloated, data-hungry tools. No ads. No tracking. Just powerful tools that respect you. --- Terms & Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://brandonguigo.notion.site/Politique-de-confidentialit-17591ec0b6688166b781cf05f89d3a2d
Screenshots
Verdict
The clearest difference is in-app purchases: Atomic Calendar at none against PlanGTD's 1. Atomic Calendar also leads on update cadence (every 9 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, ads 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. PlanGTD sells 1 in-app purchase, starting at $5.99 per month. Atomic Calendar asks for nothing beyond the download.
PlanGTD ships an update every 3 weeks, Atomic Calendar every 9 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | PlanGTD | Atomic Calendar |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | XThunder Inc. | Brandon Guigo |
In-app purchases
PlanGTD
- PlanGTD Monthly Subscription$5.991 Month
Atomic Calendar
No in-app purchases









