Just One vs Task Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Just One
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Most people fail not because they lack motivation, but because they try to do too much at once. Just One is built on a single principle: identify the one thing that would make today successful, then do it. No task lists. No projects. No overwhelm. Just one intention per day. HOW IT WORKS Every morning, you write your One Thing. One sentence. One goal. That is all. When you are ready, you start a Focus session. A clean, distraction-free timer counts down while you work. No notifications. No interruptions. Just you and your task. At the end of the day, you answer one question: did you complete it? Your streak grows with every yes. FOCUS TIMER Built-in Pomodoro-style timer from 1 to 90 minutes. Fully adjustable before each session. Vibration and local notification when your session ends, even if the app is in the background. STREAKS AND HISTORY Watch your consistency grow day by day. Your history shows every entry at a glance, with a simple record of what you set out to do and whether you did it. Every entry is yours, backed up securely to the cloud. DESIGNED TO DISAPPEAR Just One is intentionally minimal. No cluttered dashboards. No gamification traps. No badges demanding your attention. The app gets out of your way so you can do the work. Dark mode, light mode, and system-adaptive appearance. Clean typography. Generous whitespace. It feels as calm as the habit it builds. CLOUD SYNC Sign in with Apple in one tap. Your tasks and history sync automatically across all your devices. Delete and reinstall without losing a single day. PREMIUM Unlock unlimited history, advanced focus insights, and full cloud backup with Just One Premium. Available as a monthly subscription, annual subscription, or a one-time lifetime purchase. --- Just One is made for people who are serious about doing less, better. One task. One day. One streak at a time. --- LEGAL Terms of Use: https://smartaiforgesl.github.io/justone_legal_documents/terms-of-use.html Privacy Policy: https://smartaiforgesl.github.io/justone_legal_documents/privacy-policy.html
Task Chart
Break down large goals into manageable tasks with a hierarchical view and daily progress charts. Visualize your next steps for projects, work, or learning plans. Organize complex workflows from overarching objectives to granular actions.
- Hierarchical organization of goals, groups, and tasks
- Daily progress charts for plans and achievements
- Task logging with checks, numbers, and notes
- Timeline for daily tasks and progress
- Location-based reminders
- Data backup and export
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Task Chart is a planner app where your plan is written on one big sheet of paper. ■ One sheet Goals and tasks live together on a single sheet, nothing abbreviated. The phone screen is a window onto that paper. Pinch to zoom, pick a task up with your finger and rearrange it — you see where everything will settle before you let go. ■ Day by day Tap a cell and record the day in one stroke — a check, or a number. The row and the day light up in a quiet cross. Past days turn like a scroll under your finger. ■ Quiet by design No advertising. No tracking (only anonymous usage counts, which you can turn off in Settings). No badges, no streaks, no flames. Just paper and ink. ■ What you write is yours The notebook is stored on your device only, and you can export it to a file at any time. If you stop subscribing, everything you wrote stays readable. Nothing becomes unreadable. ■ About the subscription Writing — creating and editing tasks and records — requires the Task Chart subscription (US$0.99/month or US$11.99/year; prices vary by region). Reading and exporting are free without one. The first 14 days are free for new subscribers. Unless you cancel at least 24 hours before the free period ends, your Apple ID is charged for the period you chose, and it renews automatically until you cancel. You can cancel any time in iPhone Settings. If you purchased the earlier paid version, please contact support. Terms of Use: https://simasyun.github.io/taskchart-support/terms.html Privacy Policy: https://simasyun.github.io/taskchart-support/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Task Chart at none against Just One's 3. On price, ads, device support and iOS requirement 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. Just One sells 3 in-app purchases, starting at $1.99 per month. Task Chart asks for nothing beyond the download.
| Parameter | Just One | Task Chart |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Diego Garcia-Viana | Shuntaro Shimada |
In-app purchases
Just One
- Monthly Premium Subscription$1.991 Month
- Annual Premium Subscription3 Days trial$9.991 Year
- Lifetime Premium Subscription$14.99
Task Chart
No in-app purchases









