Comparison

Interval(x) vs Simple Timer

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

Head to head
About

Interval(x)

An open-source interval timer designed for precision and privacy. Configure work and rest periods with millisecond accuracy for training or daily routines. It offers a transparent, data-free experience for users who value control and simplicity.

Highlights
  • Open Source Transparency
  • Zero Data Collection
  • Millisecond Interval Precision
  • Customizable Work/Rest Periods
  • Lightweight and Power-Efficient
  • Privacy-First Design
Features
Read full description

Interval(x): Open Source Precision for Engineers Engineered for precision and transparency, Interval(x) is the ultimate interval timer for those who value control, simplicity, and privacy. Built by engineers for engineers, this app delivers unmatched timing accuracy without the frills—or the data collection. Why Engineers Love Interval(x): Open Source: Fully transparent and modifiable—because we believe in community-driven development. Zero Data Collection: Your data is yours. Interval(x) operates without tracking, analytics, or unnecessary permissions. Customizable and Precise: Configure work/rest intervals down to the millisecond to match your exact training needs. Efficient Design: Lightweight, power-efficient, and designed for those who demand performance. Privacy-First, Community-Driven Interval(x) is a privacy-focused tool that doesn't track your activity or collect your data. Its open-source codebase is available for review and contributions, ensuring transparency and trust. Whether you're training for endurance, strength, or just optimizing your daily routine, Interval(x) provides the precision and simplicity you need without sacrificing your privacy. Download Interval(x) today and experience fitness on your terms. Power your workouts with open source freedom and engineering-grade accuracy.

About

Simple Timer

Features
Read full description

Get Ready to Maximize Your Workouts! Introducing the HIIT Timer App – Your ultimate companion for interval training. Designed for fitness enthusiasts of all levels, this simple yet powerful timer makes it easier than ever to achieve your training goals. Whether you’re hitting the gym, training at home, or on the go, our app provides the necessary tools to keep you focused and motivated throughout your workouts! Key Features: Customizable Durations: Easily set your warm-up, work, rest, and cool-down durations as well as the number of rounds and repetitions for each workout. Tailor your sessions to match your fitness level and preferences! Smart Saving Function: The app remembers your exercise duration settings so you can quickly access your favorite workouts next time you train. No more re-entering details – just tap and go! Audible Alerts: Stay on track with clear sound alerts. You'll know when you've got three seconds left in your set, and you’ll hear a beep to signal the start of a new exercise so you can focus on your performance. Exciting Roadmap Ahead: Enhanced Customization: Soon, you will be able to customize each exercise with its own unique name and duration, making your training even more specific to your needs! Community Sharing: Connect with fellow fitness enthusiasts! Soon, you will be able to share your personal workout programs, allowing others to follow your routine and mix up their training. Group Plans and Challenges: Create regular training plans and invite others to join. Share and track your progress together, motivating one another to push limits and achieve goals! Why Choose HIIT Timer App? User-Friendly Interface: Designed with simplicity in mind, navigate seamlessly and set up workouts in just a few taps. Adaptable for All Levels: Whether you’re a beginner looking to jumpstart your fitness journey or a seasoned athlete aiming for the next level, our app caters to your personal training needs. Motivation at Your Fingertips: With an emphasis on community and sharing, our app nurtures motivation and brings people together to help each other succeed. Join the HIIT Revolution! Download the HIIT Timer App today and take the first step towards a fitter, healthier you. Don’t miss out on improving your fitness routine and achieving your goals through efficient interval training. Your body will thank you!

Screenshots

Interval(x)3 screens
Simple Timer4 screens

Verdict

The call

The clearest difference is update cadence: Interval(x) at every 10 days against Simple Timer's monthly. Simple Timer's advantage is iOS requirement (15.6 vs 18.1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Interval(x) ships an update every 10 days, Simple Timer monthly. The most recent releases landed on October 30, 2026 and November 8, 2026 respectively.

Scorecard2 real differences · 7 level
Interval(x) versus Simple Timer: the parameters behind the verdict, then further details
ParameterInterval(x)Simple Timer
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 10 days — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.115.6 — better
Further details — not scored
Size2 MB24 MB
Age rating4+4+
DeveloperShapeHaven Innovations LLCHyoungil Kim

In-app purchases

None

Interval(x)

No in-app purchases

None

Simple Timer

No in-app purchases

Questions

Is Interval(x) free?
Interval(x) is free to download, with no in-app purchases.
Is Simple Timer free?
Simple Timer is free to download, with no in-app purchases.
Do Interval(x) or Simple Timer have ads?
Neither Interval(x) nor Simple Timer shows ads.
Which is updated more often, Interval(x) or Simple Timer?
Interval(x) ships an update every 10 days, and Simple Timer monthly. Most recently, Interval(x) was updated on October 30, 2026 and Simple Timer on November 8, 2026.

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