Comparison

PlanGTD vs Atomic Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

Atomic Calendar

Features
Read full description

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

PlanGTD4 screens
Atomic Calendar4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 6 level
PlanGTD versus Atomic Calendar: the parameters behind the verdict, then further details
ParameterPlanGTDAtomic Calendar
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size32 MB69 MB
Age rating4+4+
DeveloperXThunder Inc.Brandon Guigo

In-app purchases

1 purchases

PlanGTD

Subscriptions1
  • PlanGTD Monthly Subscription$5.991 Month
None

Atomic Calendar

No in-app purchases

Questions

Is PlanGTD free?
PlanGTD is free to download, with in-app purchases available.
Is Atomic Calendar free?
Atomic Calendar is free to download, with no in-app purchases.
Do PlanGTD or Atomic Calendar have ads?
Neither PlanGTD nor Atomic Calendar shows ads.
Which is updated more often, PlanGTD or Atomic Calendar?
PlanGTD ships an update every 3 weeks, and Atomic Calendar every 9 days. Most recently, PlanGTD was updated on November 3, 2026 and Atomic Calendar on November 5, 2026.

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