Left vs One Thing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Left
Visualize your time with customizable widgets for your Home Screen, Lock Screen, and StandBy. Track life progress, countdowns to important events, and monitor habits with streak tracking. Offers a clean and visually appealing way to stay aware of your time.
- Time progress widgets (year, week, day)
- Life progress tracking
- Event countdowns
- Habit and streak tracking
- Customizable widget styles and colors
- Apple Calendar sync
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Left is a time-awareness app built on one idea: your time is limited, and seeing it changes how you use it. Left turns time into something you can see, then helps you act on it with habits, streaks, countdowns, and a planner for your day. TIME LEFT See where you are in the year, month, week, day, hour, and your life. Each unit is a symbol; the past dims, what remains stays in view. Your life in weeks, year progress, and life progress, made tangible. Choose dots, symbols, colors, and layouts. A quiet, honest way to face limited time without it becoming morbid. HABITS, STREAKS & AIMS Left is a habit tracker for the person you are trying to become. Build habits on any schedule: daily, several times a day, weekly, monthly, or custom. Track streaks and protect them, count the days since anything that matters, and set reminders so nothing slips. And you don't have to do it alone: share a habit or streak with a friend, keep each other accountable, and send kudos, cheers, and encouragement when it counts. With aims, you have a flexible goal tracker for anything you can count, helping you build up or cut down. Stay on track and see your progress every day. AHEAD - COUNTDOWNS & DATES Add the dates that pull you forward: trips, birthdays, holidays, anniversaries, weddings, deadlines, retirement, and personal milestones. Count down to each one, import from Apple Calendar, and track both the days until and the days since. New: every Ahead date now has its own to-do list, so you can plan the small tasks that make the date happen and check them off as it approaches. Share an Ahead date with a friend, follow it side by side, comment, and add to-dos together on joint dates. PLANNER Planner pulls everything that matters into one beautiful, time-first view: your habits, streaks, Ahead dates, Apple Calendar events, Apple Reminders, weather, sleep, and workouts, together at last. Not another calendar, but a clear, calm picture of what the day is actually asking of you. Because everything lives in one place instead of five apps, Planner is a quiet ally for ADHD minds: see the whole day at a glance and miss nothing. Two new widgets come with it: a Planner widget and a Calendar widget for your Home Screen. FASTING TOOL A simple yet beautiful fasting tool inside Left. Pick a fasting window, start it in a tap, and follow every fast live from your Lock Screen, widgets and the Dynamic Island. Your history and stats are all there too. WHY LEFT Other apps give you habits without design, or aesthetics without depth. Left combines both: the widget range, the design quality, and the full set of time tools, in one app made with restraint and taste. Left requires a Premium plan to use its features. Choose a weekly, yearly plan or a one-time lifetime purchase to unlock everything. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
One Thing
This app helps you build positive habits by blocking distracting apps until you complete a chosen meaningful activity. It uses AI-powered verification and progress tracking to keep you motivated and accountable.
- Daily meaningful activity selection
- Smart app blocking
- AI-powered camera verification
- Progress tracking and streaks
- Flexible scheduling
- Family controls integration
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Stop scrolling. Start living. One Thing flips phone addiction on its head. Instead of fighting dopamine-driven habits, this app channels them — blocking distractions until you complete one meaningful activity each day. Exercise, read, meditate, do deep work, or practice an instrument. Finish first, then earn back access. The result? A daily digital detox that builds real habits, reduces mindless scrolling, and gives you hours of focus back. SUBSCRIPTION INFORMATION All features require an active subscription after the free trial period. HOW IT WORKS (Subscription Required) Pick one activity every morning: gym, reading, meditation, studying, journaling, running, walking, or any productive pursuit. Until it's done, distracting apps stay locked. No willpower needed. The environment does the work. SMART BLOCKING (Subscription Required) System-Level Control: Native iOS Screen Time integration locks apps at the deepest level Personalized Filters: Select exactly which apps to restrict based on individual triggers Flexible Scheduling: Set weekly routines, daily challenges, or immediate timed blocks Usage Caps: Limit daily or weekly opens and minutes for specific apps Emergency Unlock: Safety valve for moments when access is genuinely urgent AI-POWERED VERIFICATION (Subscription Required) Photo Proof: Snap a picture and GPT-4 Vision confirms whether the activity was actually completed Works Everywhere: From gym selfies to reading sessions, the AI adapts to any habit No Cheating: Intelligent analysis catches shortcuts and keeps accountability honest TRUE FOCUS MODE (Subscription Required) Distraction-Free Timer: Full-screen countdown for deep work, studying, or creative sessions Cross-Device Sync: Pairs with Mac for seamless focus across phone and desktop ADHD-Friendly: Structured sessions with grace periods reduce the friction of getting started PROGRESS & MOTIVATION (Subscription Required) Streak Tracking: Build momentum day after day with visual completion calendars 18-Level Progression: Journey from "Brain Rewiring" on Day 1 to "One Year Champion" Detailed Analytics: Monitor hours saved, daily completion rates, and long-term growth Milestone Alerts: Celebrate achievements at key moments throughout the journey PRIVACY & RELIABILITY (Subscription Required) On-Device Data: Personal information never leaves the phone Background Processing: Blocks stay active even when the app is closed Live Activity Widget: Persistent lock-screen reminder showing streaks and countdowns BUILT FOR Anyone trapped in a scroll-refresh-repeat cycle Students needing structured study sessions and fewer distractions Professionals seeking a digital detox during work hours Fitness-focused individuals building consistent gym or running routines People with ADHD looking for external structure and accountability Families creating healthier relationships with technology WHY IT WORKS Traditional habit trackers send reminders and hope for the best. One Thing creates real consequences: access to social media, news, and entertainment stays blocked until the daily habit is done. It's not about restricting freedom. It's about trading a dopamine loop for a life-changing routine. JOMO (joy of missing out) replaces FOMO, one day at a time. SUBSCRIPTION DETAILS Payment: Charged to Apple ID upon confirmation of purchase Renewal: Automatically renews unless cancelled at least 24 hours before the current period ends Management: Manage or cancel anytime in Apple ID Account Settings No Commitment: Cancel at any point, no penalties Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://onethingapp.framer.website/privacy-policy
Screenshots
Verdict
Left and One Thing both sit at 4.6 stars, but that hides the real split: 73% of Left's written reviews are positive against 27% of One Thing's. Left also leads on monetization model (paid vs subscription) and update cadence (every 3 days vs every 2 weeks). One Thing's advantage is iOS requirement (17.2 vs 26.0). On price, rating, ratings volume and ads 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. Left sells 28 in-app purchases, starting at $0.99 per 7 days and One Thing sells 11 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.
One Thing holds the better App Store score, 4.7 against 4.6. Both are backed by a comparable volume of ratings — 461 and 892 respectively. Written reviews complicate that: 73% of Left's written reviews are positive against 27% of One Thing's, so the app with the better star average is not the one people write more warmly about.
Left ships an update every 3 days, One Thing every 2 weeks. Both last shipped on October 25, 2026.
| Parameter | Left | One Thing |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (461 ratings) | 4.7 (892 ratings) — better |
| Positive reviews | 73.2% of reviews — better | 27.1% of reviews |
| Number of ratings | 461 | 892 — better |
| Update frequency | Every 3 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPhone | iPhone |
| Requires iOS | 26.0 | 17.2 — better |
| Further details — not scored | ||
| Size | 246 MB | 221 MB |
| Age rating | 4+ | 4+ |
| Developer | Cntxt Limited | One Thing LTD |
Customer experience
Left
One Thing
User reviews
Left
From 461 App Store ratingsWhat we love
- 🚀 Minimalist design
- 👍 Simple and intuitive
- 🔒 Privacy-respecting
- 💡 Unique and insightful concept
- 👍 Clean and bloat-free
Room to improve
- 🐛 Buggy app with frequent issues
- 💡 Lack of customization options
- 💡 Predetermined lifespan not accurate for all users
One Thing
From 892 App Store ratingsWhat we love
- 🚀 Helps stop doom-scrolling
- 👍 Beneficial for users
- 👍 Breaks bad habits
- 👍 Helps with productivity
Room to improve
- 💰 Requires payment
- 🚫 Limited functionality without payment
Bugs and requests
Left
Reported bugs
3 issues- Widget not working
- Blank screen on widget after update
- Percentage left showing -inf%
Requested features
5 requests- Custom lifespan input
- Ability to set custom milestones
- Widget color customization
- Life widget
- Ability to track minutes left in the day
One Thing
Reported bugs
1 issue- Incompatible with younger users due to payment requirements
Requested features
3 requests- Allow multiple activities per day
- Add chores/cleaning/meal prep blocks
- Option to add multiple blocks
In-app purchases
Left
- Left Premium$0.997 Days
- Left Premium$2.997 Days
- Left Premium2 variants$3.997 Days
Show 11 moreShow fewer
- Left Premium7 Days trial$8.997 Days
- LEGEND$8.991 Year
- Left Premium7 Days trial$19.991 Year
- Left Premium$19.997 Days
- Left Premium2 variants$24.991 Year
- Left Premium7 Days trial$24.991 Year
- Left Premium$29.991 Year
- Left Premium7 Days trial$29.991 Year
- Left Premium$34.991 Year
- Left Premium7 Days trial2 variants$34.991 Year
- Thanks!$39.991 Year
- Left+$0.99
- Awesome$1.99
- Left+$2.99
Show 11 moreShow fewer
- Left+$3.99
- Legend$4.99
- Left+ Thanks$5.99
- Left+$6.99
- Left+$7.99
- Left+$8.99
- Left Premium$12.99
- Left Premium$29.99
- Left Premium2 variants$49.99
- Left Premium2 variants$69.99
- Left Premium$149.00
One Thing
- One Thing (Full Access) (Weekly)$7.997 Days
- Pro Plan Monthly$8.991 Month
- One Thing (Weekly)$12.997 Days
Show 8 moreShow fewer
- Pro Plan Yearly WB$21.901 Year
- One Thing (Full Access) (Annual)$29.991 Year
- One Thing (Yearly - BF)7 Days trial$29.991 Year
- One Thing Annual7 Days trial$39.991 Year
- Pro Plan Yearly$49.991 Year
- One Thing (Yearly)7 Days trial$49.991 Year
- One Thing (Yearly)7 Days trial$59.991 Year
- One Thing Yearly7 Days trial$69.991 Year









