20 Seconds vs Just One Thing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
20 Seconds
This app helps build new habits or break existing ones by using a 20-second countdown. It provides a progress indicator and optional sounds or music to aid in distraction and amusement during the countdown.
- 20-second habit timer
- Progress indicator
- Distracting sounds and music
- Automatic start option
- 30-day trial in Today widget
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20 Seconds is a simple app, whose only purpose is to count, you guessed it, to 20 seconds. Why, one might ask, 20 seconds? Well, there is a theory that says that 20 seconds is enough time to help you build a new habit, or help you break an existing one. To start with good habits, if you want to do something, you are much more likely to actually do it, if you start within 20 seconds from when you first thought about it. If you wait any longer, you are less likely to go through with it. Conversely, if you want to break a bad habit, waiting 20 seconds after you get the urge, will make it easier for you to avoid doing it. So, when you feel an urge to do something you want to stop doing, start the 20 Seconds app and let it count down. See how you feel about that urge after 20 seconds have passed. While counting down, the app will show a progress indicator, (with or without a random shape), play music or play ticking sounds to distract and amuse you a little bit. It can start counting automatically as soon as you start the app. It also has a 30 day trail of usage in the today widget.
Just One Thing
This app helps you simplify your day by focusing on a single meaningful task. It encourages small daily achievements to build momentum and consistency, preventing overwhelm from long to-do lists. Celebrate progress, not perfection, and build better habits one task at a time.
- Focus on one task at a time
- Avoid overwhelm
- Build daily streaks
- Preset and custom tasks
- Celebrate progress
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Just One Thing - Do Less, Move Forward Just One Thing helps you simplify your day by focusing on one meaningful task at a time. If you’ve ever felt overwhelmed by long to-do lists or unsure where to start, this app is for you. Just One Thing encourages small daily wins that help you build momentum, stay consistent, and feel in control. Why it works: - Avoid overwhelm by limiting how much you take on each day - Stay consistent without pressure - Build a streak that motivates you - Focus on what matters, not just doing more How it works: 1. Start with just one task - no matter how small. 2. Complete it to build your streak and unlock more task slots. 3. Choose from helpful preset tasks or create your own. 4. Celebrate progress - not perfection. Whether it’s opening a window, stretching, or messaging a friend, Just One Thing helps you show up and feel good doing it. Build better habits. One task at a time. Download Just One Thing and feel the power of doing less - with more intention.
Screenshots
Verdict
The clearest difference is rating: Just One Thing at 5.0 against 20 Seconds's 4.5. Just One Thing also leads on in-app purchases (none vs 2). 20 Seconds's advantage is ratings volume (19 vs 1) and update cadence (every 3 months vs every 7 months). 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. 20 Seconds sells 2 one-off in-app purchases. Just One Thing asks for nothing beyond the download.
Just One Thing holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: 20 Seconds has 19 ratings behind it against 1, so its average is the more settled of the two.
20 Seconds ships an update every 3 months, Just One Thing every 7 months. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.
| Parameter | 20 Seconds | Just One Thing |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (19 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 3 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 41 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Nishco Ltd | Tyler Ferrington |
Customer experience
20 Seconds
Just One Thing
In-app purchases
20 Seconds
- Premium Version$0.99
- A Kind Tip$0.99
Just One Thing
No in-app purchases









