Comparison

Custom Interval Timers vs Core

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

Core

This app helps you stay focused during workouts by managing intervals, work times, and rest periods with clear visual and audio cues. Save custom routines for HIIT, Tabata, or boxing, and track your training history to monitor progress.

Highlights
  • Customizable interval timers
  • Audio cues for work/rest phases
  • Save and reuse workout routines
  • Visual countdown and color coding
  • Workout history and trend tracking
  • Optional Pro features via in-app purchase
Features
Read full description

Keep your focus on the workout Core takes care of the intervals, so you can stay with your training. Set your work time, rest time and sets, then follow a clear countdown and audio cues from the first round to the last. Made for your routine Build a timer for HIIT, Tabata, circuit training or boxing rounds. Save your usual workouts and have them ready when it is time to train again. Know when to move and when to recover A large countdown and distinct work and rest colors make each phase easy to recognize at a glance. Choose audio cues that suit the way you train. See the work you have put in Revisit completed sessions and see your weekly training trends. Your training history gives every session a place beyond the final countdown. Go further with Core Pro Unlock unlimited timers and duplicates, full workout history, monthly and yearly trends, and CSV export. These features require an in-app purchase. Core Pro is optional. Available plans and prices are shown before purchase. If you choose an auto-renewable subscription, payment is charged to your Apple Account at confirmation. It renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel your subscription in your App Store account settings. Privacy policy: https://yating-900.github.io/core-timer-site/privacy.html Terms of use: https://yating-900.github.io/core-timer-site/terms.html If you have any ideas to improve the App, please contact us via coretimerapp@gmail.com. Your feedback is highly valued!

Screenshots

Custom Interval Timers4 screens
Core4 screens

Verdict

The call

The clearest difference is in-app purchases: Custom Interval Timers at none against Core's 3. Custom Interval Timers also leads on update cadence (every 4 months vs every 33 months) and ratings volume (14 vs 4). Core's advantage is ads (none vs shown). On price, rating, review sentiment and device support 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. Core sells 3 in-app purchases, starting at $1.99 per month. Custom Interval Timers asks for nothing beyond the download.

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 Core. Both are backed by a comparable volume of ratings — 14 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Custom Interval Timers ships an update every 4 months, Core every 33 months. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
Custom Interval Timers versus Core: the parameters behind the verdict, then further details
ParameterCustom Interval TimersCore
PriceFreeFree
Rating5.0 (14 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better4
Update frequencyEvery 4 months — betterEvery 33 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size40 MB9 MB
Age rating4+4+
DeveloperAlex RichYating Lu

Customer experience

Custom Interval Timers

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

Core

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Custom Interval Timers

No in-app purchases

3 purchases

Core

Subscriptions2
  • Monthly$1.991 Month
  • Yearly$9.991 Year
One-time1
  • Lifetime$14.99

Questions

Is Custom Interval Timers free?
Custom Interval Timers is free to download, with no in-app purchases.
Is Core free?
Core is free to download, with in-app purchases available.
Which has better reviews, Custom Interval Timers or Core?
Custom Interval Timers and Core are both rated 5.0 out of 5 on the App Store, from 14 and 4 ratings respectively.
Do Custom Interval Timers or Core have ads?
Custom Interval Timers shows ads; Core does not.
Which is updated more often, Custom Interval Timers or Core?
Custom Interval Timers ships an update every 4 months, and Core every 33 months. Most recently, Custom Interval Timers was updated on October 29, 2026 and Core on October 30, 2026.

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