Comparison

How Long Left vs Flexi Calendar

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

Head to head
About

How Long Left

This app helps you visualize the time remaining for your calendar events. It offers a Today Widget, Siri integration, and an Apple Watch app for convenient access. Receive notifications for upcoming events and customize your watch face with countdown complications.

Highlights
  • Countdown calendar events
  • Today Widget integration
  • Siri integration
  • Apple Watch app
  • Time remaining notifications
  • Apple Watch complications
Features
Read full description

How Long Left is a simple app that helps you manage your time by displaying the time remaining of current calendar events. It also includes a Today Widget, Siri integration, and an Apple Watch app, time remaining notifications, and more. There is also an Apple Watch complication that, with an in-app purchase, can display a countdown for current and upcoming events.

About

Flexi Calendar

Manage complex and rotating work schedules with ease. This app is designed for individuals with non-traditional weekly routines, allowing for custom schedule creation and sharing. Sync with your device's calendar and find common availability with friends.

Highlights
  • Customizable rotating schedules
  • Support for non-traditional workweeks
  • Schedule comparison with friends
  • Export to Apple Calendar
  • Find mutual availability
  • Ideal for shift workers
Features
Read full description

Your schedule doesn’t fit a standard week. Flexi turns rotating shifts into a clear, color-coded calendar and helps people you know find time together. SEE EVERY SHIFT • Build repeating work patterns, rotas, and schedule presets • Scan upcoming days at a glance • Track hours and spot trends PLAN TOGETHER • Compare group availability without sharing your entire calendar • Create group events with locations, notes, RSVP deadlines, and Going/Maybe/Can’t Go responses • Keep the next group event visible in the conversation MESSAGE PRIVATELY • Start direct chats or named group chats • Use moderators, permissions, nicknames, blocking, and reporting • New messages and event details use end-to-end encryption on supported Flexi versions STAY IN SYNC • Add selected events to Apple Calendar • Import or export the calendars you choose • Get optional reminders and notifications Contacts and calendar access are optional and requested only when you use features that need them. Account deletion is available in Settings.

Screenshots

How Long Left4 screens
Flexi Calendar4 screens

Verdict

The call

The clearest difference is rating: Flexi Calendar at 5.0 against How Long Left's 3.8. Flexi Calendar also leads on in-app purchases (none vs 4) and update cadence (daily vs every 4 months). How Long Left's advantage is ratings volume (39 vs 5) and device support (4 vs 2). On price 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. How Long Left sells 4 one-off in-app purchases. Flexi Calendar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Flexi Calendar holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: How Long Left has 39 ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

How Long Left ships an update every 4 months, Flexi Calendar daily. The most recent releases landed on July 13, 2026 and September 9, 2026 respectively.

Scorecard7 real differences · 3 level
How Long Left versus Flexi Calendar: the parameters behind the verdict, then further details
ParameterHow Long LeftFlexi Calendar
PriceFreeFree
Rating3.8 (39 ratings)5.0 (5 ratings) — better
Positive reviews58.5% of reviews—
Number of ratings39 — better5
Update frequencyEvery 4 monthsDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS12.0 — better16.4
Further details — not scored
Size27 MB21 MB
Age rating4+4+
DeveloperRyan KontosRichard Lavey

Customer experience

How Long Left

All ratings39 ratings
Positive66.7%
Neutral10.3%
Negative23.1%
Written reviews41 reviews
Positive58.5%
Neutral17.1%
Negative24.4%

Flexi Calendar

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

How Long Left

One-time4
  • How Long Left Widget$1.99
  • Premium Watch Complication$4.99
  • Legacy Pro Lifetime$39.99
Show 1 more
  • How Long Left Pro (Lifetime)$49.99
None

Flexi Calendar

No in-app purchases

Questions

Is How Long Left free?
How Long Left is free to download, with in-app purchases available.
Is Flexi Calendar free?
Flexi Calendar is free to download, with no in-app purchases.
Which has better reviews, How Long Left or Flexi Calendar?
Flexi Calendar is rated higher. How Long Left averages 3.8 out of 5 from 39 ratings, while Flexi Calendar averages 5.0 from 5 ratings.
Do How Long Left or Flexi Calendar have ads?
Neither How Long Left nor Flexi Calendar shows ads.
Which is updated more often, How Long Left or Flexi Calendar?
How Long Left ships an update every 4 months, and Flexi Calendar daily. Most recently, How Long Left was updated on July 13, 2026 and Flexi Calendar on September 9, 2026.

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