Comparison

Interval Timer vs Calculator Widget

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

Calculator Widget

Access a powerful calculator directly from your home screen or control center. Perform quick calculations without needing to open a separate application, streamlining your daily tasks.

Highlights
  • Interactive home screen widget
  • iOS 18 Control Center widget
  • StandBy mode calculator
  • Calculation history
  • Smart stack widget organization
Read full description

Experience the ultimate convenience of a calculator right at your fingertips with Calcullo - Calculator Widget! Say goodbye to the hassle of opening a separate app every time you need to crunch numbers. With Calcullo, you can access a powerful calculator directly from your home screen or control center, making quick calculations a breeze. Key Features: • Interactive Widget Perform calculations with ease. No need to open a separate app—simply tap and calculate directly from your home screen. • Control Center Widget Swipe and calculate directly from your iOS 18 Control Center • StandBy Mode Transform your iPhone into a cutting-edge smart display with a mind-blowing calculator. • History Track your previous calculations. • Smart Stack Explore several widgets in one place. Download Calcullo now and simplify your daily calculations with a widget that's always at your fingertips!

Screenshots

Interval Timer4 screens
Calculator Widget4 screens

Verdict

The call

The clearest difference is price: Interval Timer at Free against Calculator Widget's $0.99. Interval Timer also leads on review sentiment (86% vs 59%) and device support (4 vs 2). Calculator Widget's advantage is in-app purchases (none vs 3) and update cadence (every 3 days vs every 3 weeks). On rating 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

Interval Timer is free to download; Calculator Widget costs $0.99 up front. Interval Timer sells 3 in-app purchases, starting at $4.99 per month. Calculator Widget asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Interval Timer against 4.6 for Calculator Widget. Both are backed by a comparable volume of ratings — 25 and 122 respectively. Written reviews are what separate them: 86% of Interval Timer's written reviews are positive against 59% of Calculator Widget's.

UpkeepUpdate frequency

Interval Timer ships an update every 3 weeks, Calculator Widget every 3 days. The most recent releases landed on September 22, 2026 and September 26, 2026 respectively.

Scorecard8 real differences · 2 level
Interval Timer versus Calculator Widget: the parameters behind the verdict, then further details
ParameterInterval TimerCalculator Widget
PriceFree — better$0.99
Rating4.6 (25 ratings)4.6 (122 ratings)
Positive reviews85.7% of reviews — better59.4% of reviews
Number of ratings25122 — better
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size49 MB7 MB
Age rating4+4+
DeveloperMuhammed Sahil ArayakandySupagarn Pattananuchart

Customer experience

Interval Timer

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

Calculator Widget

All ratings122 ratings
Positive91.0%
Neutral3.3%
Negative5.7%
Written reviews32 reviews
Positive59.4%
Neutral15.6%
Negative25.0%

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
None

Calculator Widget

No in-app purchases

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Calculator Widget free?
Calculator Widget costs $0.99, with no in-app purchases.
Which has better reviews, Interval Timer or Calculator Widget?
Interval Timer and Calculator Widget are both rated 4.6 out of 5 on the App Store, from 25 and 122 ratings respectively.
Do Interval Timer or Calculator Widget have ads?
Neither Interval Timer nor Calculator Widget shows ads.
Which is updated more often, Interval Timer or Calculator Widget?
Interval Timer ships an update every 3 weeks, and Calculator Widget every 3 days. Most recently, Interval Timer was updated on September 22, 2026 and Calculator Widget on September 26, 2026.

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