Comparison

Seconds Interval Timer vs SH1FT

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 app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.

Highlights
  • Full-screen colored display
  • Templates for HIIT, Tabata, Circuit Training
  • Voice and audio alerts
  • Music assignment per interval
  • Background operation
  • Apple Health integration
  • Stopwatch and countdown timer
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

SH1FT

This app empowers group fitness instructors to create and deliver engaging live and online classes. It automates class structuring and cueing, saving instructors time and stress. Instructors can design unique workouts, mix formats, and teach anywhere.

Highlights
  • Automated class structuring and cueing
  • Create unique workout combinations
  • Teach live and online classes
  • Unlimited access to all workouts
  • Cross-format mash-ups
Read full description

Our market leading App allows Group Fitness Instructors to teach live and online classes like never before! We have four unique Group Fitness formats and each workout is taught using our App. The App automates the boring stuff (saving huge amounts of time and money) and gives Instructors an easy and fast way to create workouts that are unique to them. SH1FT Fitness Instructors are empowered to deliver engaging, personalised fitness classes where, when and how they want - with zero restrictions. App features: • The App structures the class for you and does the cueing and memorisation if you need it - saving you hours of prep work and taking the stress out of teaching so you can focus on the class in front of you and not what move is coming next. • Unlimited access to EVERY workout from your chosen format/s on the SH1FT App for no extra cost. • The ability to teach anywhere: you can deliver a class in any physical or virtual location that you wish. • Freedom to get creative! Use the SH1FT App to create workout combinations that suit the unique needs of your class. Plus if you are a SQUAD member in multiple SH1FT Fitness formats you have the freedom to create cross format mash-ups using the App.

Screenshots

Seconds Interval Timer4 screens
SH1FT4 screens

Verdict

The call

The clearest difference is review sentiment: Seconds Interval Timer at 75% against SH1FT's 20%. Seconds Interval Timer also leads on ratings volume (24K vs 7). SH1FT's advantage is in-app purchases (none vs 1) and rating (4.9 vs 4.7). On price, update cadence, ads 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. SH1FT asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SH1FT holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 75% of Seconds Interval Timer's written reviews are positive against 20% of SH1FT'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, SH1FT every 3 weeks. The most recent releases landed on September 26, 2026 and June 4, 2026 respectively.

Scorecard6 real differences · 4 level
Seconds Interval Timer versus SH1FT: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerSH1FT
PriceFreeFree
Rating4.7 (24K ratings)4.9 (7 ratings) — better
Positive reviews75.1% of reviews — better20.0% of reviews
Number of ratings24K — better7
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size95 MB22 MB
Age rating4+4+
DeveloperRunloop LtdSH1FT Ltd

Customer experience

Seconds Interval Timer

All ratings23,673 ratings
Positive93.0%
Neutral1.9%
Negative5.2%
Written reviews1,239 reviews
Positive75.1%
Neutral6.1%
Negative18.8%

SH1FT

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive20.0%
Neutral20.0%
Negative60.0%

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

SH1FT

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
None

SH1FT

No in-app purchases

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is SH1FT free?
SH1FT is free to download, with no in-app purchases.
Which has better reviews, Seconds Interval Timer or SH1FT?
SH1FT is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while SH1FT averages 4.9 from 7 ratings.
Do Seconds Interval Timer or SH1FT have ads?
Neither Seconds Interval Timer nor SH1FT shows ads.
Which is updated more often, Seconds Interval Timer or SH1FT?
Seconds Interval Timer ships an update monthly, and SH1FT every 3 weeks. Most recently, Seconds Interval Timer was updated on September 26, 2026 and SH1FT on June 4, 2026.

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