Boost Focus Timer vs Left
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Boost Focus Timer
Enhance your productivity with a customizable focus timer and habit tracker. Utilize a proactive AI agent to assist with goals and tasks. This app offers a comprehensive suite of tools to help you stay organized and achieve your objectives.
- Customizable focus sessions
- Habit tracking
- Goal setting
- Proactive AI agent assistance
- Fully customizable productivity tools
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Start focus sessions, track habits, goals, and get help from proactive AI -- fully customizable productivity app, just ask the AI agent.
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. FRIENDS All-new. Add the people who matter and keep each other moving. Stay accountable on the habits and streaks you share, join an Ahead date together, comment, add to-dos, and stay in the loop as it counts down. Private by design, with no public feed. 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. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Left at none against Boost Focus Timer's shown. Left also leads on ratings volume (396 vs 2) and update cadence (every 3 days vs every 2 weeks). Boost Focus Timer's advantage is rating (5.0 vs 4.6) and review sentiment (100% vs 74%). On price and in-app purchases 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. Boost Focus Timer sells 4 in-app purchases, starting at $1.49 per month and Left sells 27 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Boost Focus Timer holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Left has 396 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Boost Focus Timer's written reviews are positive against 74% of Left's.
Boost Focus Timer ships an update every 2 weeks, Left every 3 days. The most recent releases landed on September 14, 2026 and September 26, 2026 respectively.
| Parameter | Boost Focus Timer | Left |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.6 (396 ratings) |
| Positive reviews | 100.0% of reviews — better | 74.4% of reviews |
| Number of ratings | 2 | 396 — better |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 33 MB | 238 MB |
| Age rating | 4+ | 4+ |
| Developer | Jacob Beauchamp | Cntxt Limited |
Customer experience
Boost Focus Timer
Left
Bugs and requests
Boost Focus Timer
Not enough reviews yet to summarise bugs or 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
In-app purchases
Boost Focus Timer
- Boost Focus Timer Subscription7 Days trial$1.491 Month
- Boost Focus Timer Subscription7 Days trial$9.991 Year
- Rocket Timer Animation$2.99
- Battery Timer Animation$2.99
Left
- Left Premium$0.997 Days
- Left Premium$2.997 Days
- Left Premium2 variants$3.997 Days
Show 10 moreShow fewer
- Thanks!$3.991 Year
- LEGEND$8.991 Year
- Left Premium7 Days trial$19.991 Year
- Left Premium$19.997 Days
- Left Premium$24.991 Year
- Left Premium7 Days trial2 variants$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
- 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





