Comparison

Interval Timer vs Classifier Collection Tracker

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

Head to head
About

Interval Timer

This versatile timer app allows users to create custom sequences for various activities, from breathwork and workouts to focus sessions and cooking. It offers AI-powered voice guidance, iCloud synchronization across Apple devices, and a minimalist black-and-white interface.

Highlights
  • Customizable timer chains
  • Breathwork flow builder
  • Intermittent fasting timers
  • Workout routine creator
  • Focus and Pomodoro timers
  • AI voice guidance
  • iCloud sync across devices
Features
Read full description

"This isn't just another timer app. This is your favorite timer app's favorite timer app" - Cody Lee, iDownloadBlog. "What I like most about TimeWave, though, is its clean, black-and-white design" - John Voorhees, MacStories. "Liquid Glass really comes to life on its widgets" - Michael Burkhardt, 9to5Mac. "Best iPhone Apps of July, 2021" - Beau Hamilton, Slashdot. WHAT CAN YOU DO WITH TIMEWAVE? TimeWave allows you to combine your breathwork app, your workout app, your focus timer, cooking timer and much more into one single app. You can use TimeWave for: • Breathwork — build custom breathing flows like 4-7-8 Breathing to lower blood pressure, Physiological Sigh to reduce stress and anxiety, Wim Hof Breathing to increase alertness, Box Breathing to relax and much more. • Intermittent Fasting — Create your own intermittent fasting using various splits like 16:8, 12:12, 5:2, etc. You can create timer-splits for each day or for the entire week. • Workout Routines — create your own workouts by chaining excercise and break durations. You can make Tabata/HIIT workouts or even yoga routines. • 20-20-20 Rule — create a timewave to follow the 20-20-20 rule (Every 20 minutes look at something 20 ft away for 20 seconds) while working with screens to prevent eye-strain. • Focus Timers — create pomodoro timers or any kind of work-break timewaves. You are not restricted to 25 minute session, you can create any sequence that suits your preferences. • Cooking — ever had to keep resetting your timers after each whistle? well, now you wont have to. Just create a timewave for each recipe. • Everything — anything else that involves timed sequential tasks. SPECIAL FEATURES: • TimeWave A.I — TimeWave will tell you what has to be done for how long while the Calibre is running. For eg: "Breathe In For 4 Seconds" so you don't have to look at the screen. • iCloud Sync — Available on Mac, iPad, iPhone and Apple Watch and keeps everything up-to to date on all your devices with iCloud Sync. • Black & White UI — B&W is a lot of colours. If you are anything like us, you'll love our ironically modern black and white UI. MORE: • Personal touch — a hand-crafted Indie app. If you have any questions or feedback, you can reach out to us at timewave.team@gmail.com Privacy Policy: https://timewaveapp.com/privacy Terms of Use: https://timewaveapp.com/terms

About

Classifier Collection Tracker

Digitize and manage your diverse collections with this app. Catalog items, track what you need, and generate statistics. Share and sync collections across devices.

Highlights
  • Catalog any collectible
  • Wishlist management
  • Collection statistics
  • Customizable templates
  • Tagging for organization
  • Cross-device sync
  • Export collections
Features
Read full description

Are you a passionate collector looking for the ultimate way to manage your treasures? Look no further than Classifier, the must-have app for organizing and tracking your collections of license plates, coins, trading cards, figurines, or any of your other collectibles. With our app, you can easily keep track of your collections, know which collectibles you still need (because let's face it, you can never have too many), and generate comprehensive statistics about your collections. Classifier was created for collectors of *pretty much anything* who want to show off their collections without the hassle of having to physically take them everywhere. Built with Apple design guidelines in mind, Classifier feels right at home on your iPhone, iPad or Mac, and with input from hundreds of collectors like yourself, it is the easiest way to digitize your collections. Whether you're a seasoned collector with decades of experience or a newcomer just starting out on your collecting journey, Classifier is the perfect app to help you organize your collections and take your hobbies to the next level. Download it today and see the difference it can make in your life. Why Classifier? • All your collections in one place, accessible at any time, anywhere • Choose from a range of ready-made collection templates, or create your own using our advanced collection creation tool • Record desired collectibles in a wishlist, so you'll never forget what you're still looking for 
• Organize your collectibles with just a few taps using our tagging feature • Keep on top of your collections with our new Lock Screen Widgets (Requires Classifier Pro) • Export entire collections and wishlists to spreadsheets and images • Share your collections with other Classifier users • Automatically sync your collections between devices via iCloud • Create detailed statistics about your collections Not only that, but there are a few other things worth shouting about:
• No sign up required • Universal iPhone and iPad support • Support for dark mode, dynamic type, and VoiceOver • 100% ad-free • Privacy-focused - we don't sell your data! Templates are available for the following collections, and more are being added all the time:
• License Plates
• Coins • Pokémon and other Trading Cards • Funko POP! Figures
• Lego Sets & Minifigs
• Video Games • Art & Pottery • Stamps • Vinyls • Sports Jerseys • Beanie Babies • Computers • Hot Wheels • Sneakers • Comic Books • Film Cameras • Board Games • Sneakers • Event Tickets If you have any questions or feedback, please send an email to classifier@appdeco.ca Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Interval Timer4 screens
Classifier Collection Tracker4 screens

Verdict

The call

The clearest difference is update cadence: Classifier Collection Tracker at every 6 days against Interval Timer's every 3 weeks. Classifier Collection Tracker also leads on iOS requirement (18.6 vs 26.0). Interval Timer's advantage is review sentiment (86% vs 70%). On price, rating, ratings volume 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. Interval Timer sells 3 in-app purchases, starting at $4.99 per month and Classifier Collection Tracker sells 6 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Interval Timer against 4.5 for Classifier Collection Tracker. Both are backed by a comparable volume of ratings — 25 and 65 respectively. Written reviews are what separate them: 86% of Interval Timer's written reviews are positive against 70% of Classifier Collection Tracker's.

UpkeepUpdate frequency

Interval Timer ships an update every 3 weeks, Classifier Collection Tracker every 6 days. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Timer versus Classifier Collection Tracker: the parameters behind the verdict, then further details
ParameterInterval TimerClassifier Collection Tracker
PriceFreeFree
Rating4.6 (25 ratings) — better4.5 (65 ratings)
Positive reviews85.7% of reviews — better69.7% of reviews
Number of ratings2565 — better
Update frequencyEvery 3 weeksEvery 6 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, Mac
Requires iOS26.018.6 — better
Further details — not scored
Size49 MB20 MB
Age rating4+4+
DeveloperMuhammed Sahil ArayakandyApp Deco Studio Inc.

Customer experience

Interval Timer

All ratings25 ratings
Positive92.0%
Neutral0.0%
Negative8.0%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Classifier Collection Tracker

All ratings65 ratings
Positive87.7%
Neutral1.5%
Negative10.8%
Written reviews33 reviews
Positive69.7%
Neutral9.1%
Negative21.2%

In-app purchases

3 purchases

Interval Timer

Subscriptions2
  • Monthly Premium$4.991 Month
  • Yearly Premium7 Days trial$24.991 Year
One-time1
  • Lifetime Premium$49.99
6 purchases

Classifier Collection Tracker

Subscriptions4
  • Classifier Pro (Quarterly)$4.993 Months
  • Classifier Pro (Quarterly)$7.993 Months
  • Classifier Pro (Yearly)$19.991 Year
Show 1 more
  • Classifier Pro (Yearly)$34.991 Year
One-time2
  • Classifier Pro (Lifetime)$49.99
  • Classifier Pro (Lifetime)$89.99

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Classifier Collection Tracker free?
Classifier Collection Tracker is free to download, with in-app purchases available.
Which has better reviews, Interval Timer or Classifier Collection Tracker?
Interval Timer is rated higher. Interval Timer averages 4.6 out of 5 from 25 ratings, while Classifier Collection Tracker averages 4.5 from 65 ratings.
Do Interval Timer or Classifier Collection Tracker have ads?
Neither Interval Timer nor Classifier Collection Tracker shows ads.
Which is updated more often, Interval Timer or Classifier Collection Tracker?
Interval Timer ships an update every 3 weeks, and Classifier Collection Tracker every 6 days. Most recently, Interval Timer was updated on September 22, 2026 and Classifier Collection Tracker on September 8, 2026.

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