Comparison

Left vs Neuron1

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

Head to head
About

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.

Highlights
  • Time progress widgets (year, week, day)
  • Life progress tracking
  • Event countdowns
  • Habit and streak tracking
  • Customizable widget styles and colors
  • Apple Calendar sync
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. 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/

About

Neuron1

Features
Read full description

Connect with a compatible device and start sessions directly from your mobile device. View live signal activity before and during use. Record and review session history in one place. Use guided flows to move from setup to session with ease. Explore interactive game experiences that respond during sessions. Monitor signal quality and confirm readiness before continuing. Stay engaged through a clean, mobile-friendly interface designed for repeat use. Neuron1 is designed to make signal-based interaction more accessible by combining session tracking, live data visibility, and interactive experiences in a single app. Whether starting a new session, reviewing previous recordings, or engaging with responsive environments, the app keeps the process simple and intuitive. NeuroField’s broader ecosystem includes personal-use technology tools and research-focused systems, aligning with the app’s emphasis on connected experiences and real-time signal interaction. Important: Neuron1 is not a medical device and is not intended for medical use, diagnosis, or treatment.

Screenshots

Left4 screens
Neuron14 screens

Verdict

The call

The clearest difference is in-app purchases: Neuron1 at none against Left's 32. Neuron1 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Left sells 27 in-app purchases, starting at $0.99 per 7 days. Neuron1 asks for nothing beyond the download.

UpkeepUpdate frequency

Left ships an update every 3 days, Neuron1 every 5 days. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Left versus Neuron1: the parameters behind the verdict, then further details
ParameterLeftNeuron1
PriceFreeFree
Rating4.6 (396 ratings) — better—
Positive reviews74.4% of reviews—
Number of ratings396 — better—
Update frequencyEvery 3 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size238 MB655 MB
Age rating4+4+
DeveloperCntxt LimitedNeuroField, Inc.

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

Neuron1

Not enough reviews yet to summarise bugs or requests.

In-app purchases

27 purchases

Left

Subscriptions13
  • Left Premium$0.997 Days
  • Left Premium$2.997 Days
  • Left Premium2 variants$3.997 Days
Show 10 more
  • 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
One-time14
  • Left+$0.99
  • Awesome$1.99
  • Left+$2.99
Show 11 more
  • 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
None

Neuron1

No in-app purchases

Questions

Is Left free?
Left is free to download, with in-app purchases available.
Is Neuron1 free?
Neuron1 is free to download, with no in-app purchases.
Do Left or Neuron1 have ads?
Neither Left nor Neuron1 shows ads.
Which is updated more often, Left or Neuron1?
Left ships an update every 3 days, and Neuron1 every 5 days. Most recently, Left was updated on September 25, 2026 and Neuron1 on September 8, 2026.

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