3 Things a Day vs SubAtomic
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
3 Things a Day
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Your to-do list is making you anxious. The modern task manager is a trap. It is an infinite scroll of guilt. You add 20 items, you complete 5, and you go to bed feeling like a failure. You aren't productive; you are just busy. 3 Things is not a place to dump your brain. It is a tool to sharpen it. We built this app on a simple, brutal truth: You cannot do everything. But you can do the 3 most important things. This is your daily contract with yourself. THE PHILOSOPHY This app is based on the Ivy Lee Method and the principles of Essentialism. It forces you to make a choice. If everything is a priority, nothing is. By limiting your day to just 3 slots, you are forced to separate the "busy work" from your "life's work." HOW IT WORKS โข Plan: Every morning, define your 3 non-negotiables. โข Focus:Work on these tasks single-mindedly. โข Execute: Check them off to get the dopamine hit. โข Repeat: Build a streak of days where you actually finish. WHY "LIMITS" ARE A FEATURE Today shows three slots. There is no fourth slot. For a new set of three, finish these three and start a new day, or reset today. This is not a bug; it is the point. Limitations create freedom. By blocking the noise, we help you focus on the signal. STOP MANAGING. START FINISHING. Ditch the complex tools. Stop hoarding tasks you will never do. Download 3 Things. Choose your focus. Win the day. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SubAtomic
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SubAtomic is a habit tracker that provides delightful animations that let you celebrate building habits in your own style It features a beautiful well designed interface, with ability to add unlimited habits, and customize the animations and color of each of them. You can also rearrange in order to prioritize the most important habits up top. After some time, you can look at your year, and see the progression you have gained, all in a fun circular calendar dial. One payment unlocks all six animations, every app color, and sync across your devices. We hope you enjoy the experience, and build habits that enrich your life. Terms of use: https://www.sinasamaki.com/subatomic-terms-of-use/ Privacy policy: https://www.sinasamaki.com/subatomic-privacy/
Screenshots
Verdict
The clearest difference is update cadence: SubAtomic at every 3 days against 3 Things a Day's weekly. 3 Things a Day's advantage is iOS requirement (15.0 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. 3 Things a Day sells 2 in-app purchases, starting at $4.99 per month and SubAtomic sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
3 Things a Day ships an update weekly, SubAtomic every 3 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | 3 Things a Day | SubAtomic |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 3 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 โ better | 18.2 |
| Further details โ not scored | ||
| Size | 92 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | CWTI Ltd | sinasamaki |
In-app purchases
3 Things a Day
- Monthly7 Days trial$4.991 Month
- Yearly7 Days trial$24.991 Year
SubAtomic
- SubAtomic Pro$1.991 Month
- SubAtomic Pro - Yearly$19.991 Year
- SubAtomic Pro: One-time purchase$8.99









