Comparison

Custom Interval Timers vs Harlen

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

Head to head
About

Custom Interval Timers

Design personalized interval timers for workouts or productivity. Its intuitive editor allows for custom flows with various settings like countdowns and personalized interfaces. Offers light/dark modes and an option to disable ads.

Highlights
  • Customizable interval flows
  • Intuitive timer editor
  • Count up or down timers
  • Personalized running interface
  • Light/dark mode
  • Ad-free option
Features
Read full description

Create highly customizable interval timers in a beautiful Interface. Interval timers are useful for exercise, like High-intensity interval training (HIIT) or Tabata, and can also be used to manage productivity, events, and more! This app provides a fascinatingly simple and intuitive editor for setting up your own custom timers. With just a few building blocks you can create the exact experience you want. Multiple settings to match your preferences: - Count up or down - Personalize the running interface to show what matters to you - Light/dark mode - Disable ads for free!

About

Harlen

This app allows athletes to securely connect with their coach, granting access to wearable and health data. Athletes can view their connection status and recent metrics like heart rate, sleep, and steps directly on their coach's dashboard.

Highlights
  • Secure coach linking
  • Wearable data sync
  • Health metric sharing
  • Consent management
  • Athlete dashboard view
Features
Read full description

The app lets athletes securely link with their coach, grant permission for wearable and health data access, and keep their latest metrics available to their coach’s dashboard. Once connected, athletes can view their coach link, wearable connection status, and recent data such as resting heart rate, sleep, and steps. Harlen is intentionally simple: the coaching workflow happens on the coach’s web dashboard, while the mobile app helps athletes connect their account, manage consent, sync wearable data, contact support, and control their account. Harlen is not a medical device and does not provide medical advice, diagnosis, treatment, or medical decision-making guidance. The information and recommendations provided by Harlen are intended for informational and wellness purposes only. Always consult a physician or other qualified healthcare professional, in addition to using Harlen, before making medical decisions or changing any treatment, health, fitness, or recovery plan. Never disregard, avoid, or delay seeking professional medical advice because of information provided by this app.

Screenshots

Custom Interval Timers4 screens
Harlen3 screens

Verdict

The call

The clearest difference is ads: Harlen at none against Custom Interval Timers's shown. Harlen also leads on update cadence (every 11 days vs every 4 months) and monetization model (free vs ad-supported). Custom Interval Timers's advantage is ratings volume (14 vs 2). On price, rating, review sentiment 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Custom Interval Timers against 5.0 for Harlen. That said, the two scores are not equally well evidenced: Custom Interval Timers has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Custom Interval Timers ships an update every 4 months, Harlen every 11 days. The most recent releases landed on October 29, 2026 and October 17, 2026 respectively.

Scorecard4 real differences · 6 level
Custom Interval Timers versus Harlen: the parameters behind the verdict, then further details
ParameterCustom Interval TimersHarlen
PriceFreeFree
Rating5.0 (14 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better2
Update frequencyEvery 4 monthsEvery 11 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size40 MB36 MB
Age rating4+17+
DeveloperAlex RichDANIEL VINH NGUYEN

Customer experience

Custom Interval Timers

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Harlen

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

In-app purchases

None

Custom Interval Timers

No in-app purchases

None

Harlen

No in-app purchases

Questions

Is Custom Interval Timers free?
Custom Interval Timers is free to download, with no in-app purchases.
Is Harlen free?
Harlen is free to download, with no in-app purchases.
Which has better reviews, Custom Interval Timers or Harlen?
Custom Interval Timers and Harlen are both rated 5.0 out of 5 on the App Store, from 14 and 2 ratings respectively.
Do Custom Interval Timers or Harlen have ads?
Custom Interval Timers shows ads; Harlen does not.
Which is updated more often, Custom Interval Timers or Harlen?
Custom Interval Timers ships an update every 4 months, and Harlen every 11 days. Most recently, Custom Interval Timers was updated on October 29, 2026 and Harlen on October 17, 2026.

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