Comparison

Seconds Interval Timer vs i

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

Head to head
About

Seconds Interval Timer

This interval timer app helps you build and run custom workouts for HIIT, Tabata, and circuits. It provides voice cues, runs in the background, and syncs with Apple Watch. Save workouts to Apple Health and track calories burned.

Highlights
  • Build custom timers for any workout
  • Voice cues for intervals
  • Runs in background with screen off
  • Syncs with Apple Watch
  • Color-coded interval display
  • Save workouts to Apple Health
  • Play music with cues
Features
Read full description

Seconds is an interval timer for HIIT, Tabata, EMOM, circuits and any workout built from timed intervals. It calls each interval out loud, keeps running with the screen off, and runs on iPhone, iPad and Apple Watch. Apple has featured it, and Joe Wicks, The Body Coach, has said it is the fitness app he uses more than any other. BUILD ANY WORKOUT - Start from a HIIT, Tabata or circuit template, or build a timer from scratch with sets, rounds and intervals of different lengths. - Chain timers into one compound timer, so a warm-up flows into the main set and then a cool-down. - Color-code every interval so you know what is coming before the beep. - Share a timer with a friend in one tap. HEAR IT, DON'T WATCH IT - Voice cues call out each interval by name and warn you before the next one starts. - Beeps and bells are there too if you would rather not be talked at. - Play your own music, per timer or per interval. Cues duck the music and it comes back up when they are done. - The timer keeps going in the background while you use other apps or the screen sleeps. ON THE GYM FLOOR - A full-screen, color-coded display you can read from across the room, in portrait or landscape. On iPad it uses the whole screen. - A lock button stops a stray tap from pausing your set. APPLE WATCH - Seconds runs on the watch by itself, so the phone can stay in the locker. Timers you build on the phone sync to the wrist, and Quick Intervals builds a basic circuit on the watch itself. MORE TIMERS - A stopwatch that marks your best and worst laps. - A countdown timer with five preset durations (three on Apple Watch). APPLE HEALTH - Save workouts and mindful sessions to Health. With a heart rate monitor connected, Seconds reads your body measurements and year of birth from Health to estimate calories burned. FREE TO TRY, ONE PAYMENT TO UNLOCK - Everything is available from the first launch. Build any timer and run it. - Each timer locks after you run it once. A single in-app purchase removes the lock on every timer you make. SECONDS AND SECONDS PRO - Seconds Pro is the same app, paid once up front, with nothing to unlock. The two are separate products and a purchase in one does not carry over to the other. If you bought Seconds Pro, download Seconds Pro. If you bought the unlock in Seconds, download Seconds and use Restore Purchases.

About

i

This interval timer app allows for customizable repeat and interval settings. It includes features to measure elapsed time after stopping, mute functionality, and a skip option to advance timers.

Highlights
  • Repeat timer function
  • Interval time settings
  • Elapsed time measurement
  • Mute function
  • Skip timer function
Features
Read full description

This is a timer application that can be repeated settings and interval settings. ** The following features are distinctive. ・ Repeat function of timer ・ Setting function of interval time ・ Measure function of time elapsed since the timer is stopped ・ Mute function ・ Skip function of timer. (It can be used when you want to move to the next timer.) ** Supplement ・ I use part of the image made by Katerina Knizakova for the icon. ・ The image of the App Store uses a part of image made by Mikegi .

Screenshots

Seconds Interval Timer4 screens
i4 screens

Verdict

The call

The clearest difference is review sentiment: Seconds Interval Timer at 74% against i's 38%. Seconds Interval Timer also leads on ads (none vs shown) and ratings volume (24K vs 1). i's advantage is rating (5.0 vs 4.7) and update cadence (every 9 days vs monthly). On price, in-app purchases, monetization model 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. Seconds Interval Timer sells 1 one-off in-app purchase and i sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

i holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 74% of Seconds Interval Timer's written reviews are positive against 38% of i's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, i every 9 days. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

Scorecard6 real differences · 4 level
Seconds Interval Timer versus i: the parameters behind the verdict, then further details
ParameterSeconds Interval Timeri
PriceFreeFree
Rating4.7 (24K ratings)5.0 (1 ratings) — better
Positive reviews74.5% of reviews — better37.5% of reviews
Number of ratings24K — better1
Update frequencyMonthlyEvery 9 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.013.6 — better
Further details — not scored
Size99 MB8 MB
Age rating4+4+
DeveloperRunloop LtdFoodmenu.world Inc.

Customer experience

Seconds Interval Timer

All ratings23,780 ratings
Positive92.9%
Neutral1.9%
Negative5.2%
Written reviews1,289 reviews
Positive74.5%
Neutral6.4%
Negative19.1%

i

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive37.5%
Neutral25.0%
Negative37.5%

Bugs and requests

Seconds Interval Timer

Reported bugs

2 issues
  • Timer sometimes stops working unexpectedly
  • Issues with restoring purchases on new devices

Requested features

5 requests
  • Ability to change beep/alert volume independently
  • Option to delay transition between intervals
  • Sync workouts across devices
  • More preset workout templates
  • Heart rate monitoring integration

i

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
1 purchases

i

One-time1
  • full_version$0.99

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is i free?
i is free to download, with in-app purchases available.
Which has better reviews, Seconds Interval Timer or i?
i is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while i averages 5.0 from 1 ratings.
Do Seconds Interval Timer or i have ads?
i shows ads; Seconds Interval Timer does not.
Which is updated more often, Seconds Interval Timer or i?
Seconds Interval Timer ships an update monthly, and i every 9 days. Most recently, Seconds Interval Timer was updated on November 1, 2026 and i on October 26, 2026.

Other comparisons