Comparison

Boost Focus Timer vs Left

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Customizable focus sessions
  • Habit tracking
  • Goal setting
  • Proactive AI agent assistance
  • Fully customizable productivity tools
Features
Read full description

Start focus sessions, track habits, goals, and get help from proactive AI -- fully customizable productivity app, just ask the AI agent.

About

Left

This app helps you visualize and manage your limited time through habit tracking, countdowns, and a daily planner. It offers features like Pomodoro timers and fasting tools to enhance productivity and awareness of your time.

Highlights
  • Time visualization (year, month, week, day, hour)
  • Habit tracking with streaks and reminders
  • Countdown timers for future events
  • Integrated daily planner
  • Pomodoro focus timer
  • Fasting tool
  • Widgets for Home Screen and Dynamic Island
Read full description

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. POMODORO FOCUS A calm Pomodoro timer inside Left. Choose your focus and break lengths and one of four timer styles, start a session in a tap, and follow it live from your Lock Screen, widgets and the Dynamic Island. Your focus history is all there too. 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/

Screenshots

Boost Focus Timer4 screens
Left4 screens

Verdict

The call

The clearest difference is rating: Left at 4.6 against Boost Focus Timer's 3.7. Left also leads on ads (none vs shown) and ratings volume (514 vs 3). Boost Focus Timer's advantage is review sentiment (100% vs 73%) and device support (3 vs 1). On price, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Boost Focus Timer sells 4 in-app purchases, starting at $1.49 per month and Left sells 9 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Left holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Left has 514 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of Boost Focus Timer's written reviews are positive against 73% of Left's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Boost Focus Timer ships an update every 2 weeks, Left every 4 days. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

Scorecard7 real differences · 3 level
Boost Focus Timer versus Left: the parameters behind the verdict, then further details
ParameterBoost Focus TimerLeft
PriceFreeFree
Rating3.7 (3 ratings)4.6 (514 ratings) — better
Positive reviews100.0% of reviews — better73.0% of reviews
Number of ratings3514 — better
Update frequencyEvery 2 weeksEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better26.0
Further details — not scored
Size33 MB238 MB
Age rating4+4+
DeveloperJacob BeauchampCntxt Limited

Customer experience

Boost Focus Timer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Left

All ratings514 ratings
Positive89.7%
Neutral3.5%
Negative6.8%
Written reviews341 reviews
Positive73.0%
Neutral8.2%
Negative18.8%

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

4 purchases

Boost Focus Timer

Subscriptions2
  • Boost Focus Timer Subscription7 Days trial$1.491 Month
  • Boost Focus Timer Subscription7 Days trial$9.991 Year
One-time2
  • Rocket Timer Animation$2.99
  • Battery Timer Animation$2.99
9 purchases

Left

Subscriptions7
  • Left Premium$0.997 Days
  • Left Premium$2.997 Days
  • Left Premium$3.997 Days
Show 4 more
  • Left Premium7 Days trial$8.997 Days
  • Left Premium2 variants$24.991 Year
  • Left Premium7 Days trial$24.991 Year
  • Left Premium$29.991 Year
One-time2
  • Left Premium Lifetime Deal$49.99
  • Left Premium Lifetime$69.99

Questions

Is Boost Focus Timer free?
Boost Focus Timer is free to download, with in-app purchases available.
Is Left free?
Left is free to download, with in-app purchases available.
Which has better reviews, Boost Focus Timer or Left?
Left is rated higher. Boost Focus Timer averages 3.7 out of 5 from 3 ratings, while Left averages 4.6 from 514 ratings.
Do Boost Focus Timer or Left have ads?
Boost Focus Timer shows ads; Left does not.
Which is updated more often, Boost Focus Timer or Left?
Boost Focus Timer ships an update every 2 weeks, and Left every 4 days. Most recently, Boost Focus Timer was updated on October 30, 2026 and Left on November 8, 2026.

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