Comparison

Box Timer vs Interval(x)

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

Head to head
About

Box Timer

This app provides a simple, distraction-free timer designed for intense training sessions like CrossFit, HIIT, and functional fitness. It features a massive, high-contrast display, customizable interval options, and seamless audio cue integration with music apps. All workouts are automatically saved for easy tracking and reuse.

Highlights
  • Massive, high-contrast display
  • Supports AMRAP, EMOM, For Time, Tabata
  • Customizable work/rest intervals and rounds
  • Works with music apps, clear audio cues
  • Automatic workout history and reuse
  • Background operation and screen lock support
  • No ads or sign-up required
Features
Read full description

SIMPLE TIMER BUILT FOR SERIOUS TRAINING Box Timer brings the power of a CrossFit box timer to your phone. Massive display. Zero distractions. Works perfectly whether you're in the gym, at home, or training outdoors. BUILT FOR CROSSFIT, HIIT & FUNCTIONAL FITNESS From crushing WODs to HYROX training and daily circuits — Box Timer handles every workout type with a clean interface that keeps you focused on the work, not the timer. EVERY WORKOUT TYPE COVERED - AMRAP (As Many Rounds As Possible) - EMOM (Every Minute On the Minute) - For Time workouts with countdown - Tabata (20/10 protocol) - Custom intervals with work/rest periods and rounds - Count up or count down modes DESIGNED FOR VISIBILITY – Massive timer display with high-contrast text – Landscape mode for maximum size – Readable from 10+ meters away – Perfect for garage gyms and home workouts AUDIO THAT WORKS WITH YOUR MUSIC – Crystal-clear audio cues for round changes – Works seamlessly with Spotify, Apple Music, and any audio app – No interruptions to your playlist – Simple settings for audio on/off SAVE YOUR GO-TO TIMERS – Save any timer as a named preset – Load it again with one tap from the timer screen – Edit or delete presets anytime – Never set up the same workout twice ZERO FRICTION EXPERIENCE – Works in background and with screen locked – No account or sign-up required – No ads – Lightning-fast timer setup – Runs smoothly even during intense workouts GLOBAL FITNESS COMMUNITY Available in English, Swedish, German, Spanish, Polish, French, and Japanese WHY ATHLETES CHOOSE BOX TIMER "This app is a must have for CrossFit workouts. Ideal for emoms, amraps and for time workouts. I even use it for strength work like squats by programming beeps for 45 seconds work and 2 minutes rest. And it’s free! I mean come on." Whether you're an elite athlete or just starting your fitness journey, Box Timer delivers exactly what you need: a powerful, distraction-free timer that stays out of your way. Get it now and experience the difference.

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.

Screenshots

Box Timer4 screens
Interval(x)3 screens

Verdict

The call

The clearest difference is ratings volume: Box Timer at 2.9K against Interval(x)'s 1. Interval(x)'s advantage is update cadence (every 10 days vs monthly). On price, rating, ads 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 — 4.9 for Box Timer against 5.0 for Interval(x). That said, the two scores are not equally well evidenced: Box Timer has 2.9K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Box Timer ships an update monthly, Interval(x) every 10 days. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Box Timer versus Interval(x): the parameters behind the verdict, then further details
ParameterBox TimerInterval(x)
PriceFreeFree
Rating4.9 (2.9K ratings)5.0 (1 ratings) — better
Positive reviews93.2% of reviews—
Number of ratings2.9K — better1
Update frequencyMonthlyEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS18 — better18.1
Further details — not scored
Size7 MB2 MB
Age rating4+4+
DeveloperEdvin LindenShapeHaven Innovations LLC

Customer experience

Box Timer

All ratings2,916 ratings
Positive96.9%
Neutral1.5%
Negative1.6%
Written reviews132 reviews
Positive93.2%
Neutral0.0%
Negative6.8%

Interval(x)

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Box Timer

Reported bugs

3 issues
  • Timer not functioning properly in landscape mode
  • Review prompt interfering with timer operation
  • Compatibility issues on certain iPad models

Requested features

4 requests
  • Round count display during rest periods
  • Customizable countdown beeps or sounds
  • Ability to save and load custom timer settings
  • Apple Watch app support

Interval(x)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Box Timer

No in-app purchases

None

Interval(x)

No in-app purchases

Questions

Is Box Timer free?
Box Timer is free to download, with no in-app purchases.
Is Interval(x) free?
Interval(x) is free to download, with no in-app purchases.
Which has better reviews, Box Timer or Interval(x)?
Interval(x) is rated higher. Box Timer averages 4.9 out of 5 from 2.9K ratings, while Interval(x) averages 5.0 from 1 ratings.
Do Box Timer or Interval(x) have ads?
Neither Box Timer nor Interval(x) shows ads.
Which is updated more often, Box Timer or Interval(x)?
Box Timer ships an update monthly, and Interval(x) every 10 days. Most recently, Box Timer was updated on September 24, 2026 and Interval(x) on September 18, 2026.

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