Comparison

Seconds Interval Timer vs Sezzy Timer

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

Sezzy Timer

This app provides pre-formatted workout timers for various fitness routines, including HIIT and Pilates. It offers visual and auditory cues to guide users through exercises and rest periods, allowing for efficient and motivating workouts. Users can also create custom timers and listen to music simultaneously.

Highlights
  • Eleven unique pre-formatted timers
  • Custom timer creation
  • Visual and auditory cues
  • Background operation with music
  • Pause and play functionality
  • Next exercise display
Features
Read full description

The perfect pre-formatted timer app that allows you to get straight into your workout with the click of a button! Whether you're smashing out a HIIT workout, pilates or your own custom circuit, the Sezzy Timer has ELEVEN unique timers to use so your workouts are always efficient, fun and on track! Each timer uses visual and auditory cues to ensure you know what exercise you're up to! You can also listen to your tunes simultaneously as the timer to stay in the zone and maintain motivation. Timers to chose from: 1. Sweaty Shredder 2. Toning Power 3. 10 Minute Blaster 4. 15 Minute Burner 5. AMRAP 6. Custom Timer 7. 30 Min Pilates 8. HIIT Pilates 9. 45/15 Sweat 10. 10 Min Movement 11. Express Cardio All Timers Include: - Visual cues including rest, sets, circuit, exercises, supersets or rounds (depending what kind of workout you’re doing) - Auditory cues allowing you to step away from your phone and complete the workout purely through listening. Sezzy Timer specifies what round, exercise, set or rest period you’re up to. It will also help count you down until your next movement - Works in the background of your phone allowing you to listen to music and smash through your workout, while hearing cues from the timer app - Custom option to create your own personalised workout - Pause, and play option - Display of what is coming up next in your workout to better prepare your body. The Sezzy Timer app is simple, quick and easy to use and requires little to no preparation. Setting up timers and organising rounds, exercises and sets can often be confusing and tricky, so I’m here to take the stress out of your workout. Follow my cues and you’re on your way to a successful, sweaty, soul fulfilling workout!

Screenshots

Seconds Interval Timer4 screens
Sezzy Timer4 screens

Verdict

The call

The clearest difference is price: Seconds Interval Timer at Free against Sezzy Timer's $1.99. Seconds Interval Timer also leads on rating (4.7 vs 3.9) and review sentiment (75% vs 50%). Sezzy Timer's advantage is in-app purchases (none vs 1) and chart position (#93 vs unranked). On 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

Seconds Interval Timer is free to download; Sezzy Timer costs $1.99 up front. Seconds Interval Timer sells 1 one-off in-app purchase. Sezzy Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Seconds Interval Timer holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 100, so its average is the more settled of the two. Written reviews point the same way: 75% of Seconds Interval Timer's written reviews are positive against 50% of Sezzy Timer's.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, Sezzy Timer every 3 months. The most recent releases landed on September 26, 2026 and September 23, 2026 respectively.

Scorecard9 real differences · 2 level
Seconds Interval Timer versus Sezzy Timer: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerSezzy Timer
PriceFree — better$1.99
Rating4.7 (24K ratings) — better3.9 (100 ratings)
Positive reviews75.1% of reviews — better50.0% of reviews
Number of ratings24K — better100
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#93 — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.012.0 — better
Further details — not scored
Size95 MB22 MB
Age rating4+4+
DeveloperRunloop LtdSarah's Day Pty Limited

Customer experience

Seconds Interval Timer

All ratings23,662 ratings
Positive93.0%
Neutral1.9%
Negative5.2%
Written reviews1,239 reviews
Positive75.1%
Neutral6.1%
Negative18.8%

Sezzy Timer

All ratings100 ratings
Positive66.0%
Neutral14.0%
Negative20.0%
Written reviews106 reviews
Positive50.0%
Neutral18.9%
Negative31.1%

User reviews

Seconds Interval Timer

From 24K App Store ratings

What we love

  • 🚀 Great workout app
  • 👍 Customizable and user-friendly
  • 🔒 Reliable and stable
  • 💡 Versatile for various workouts
  • 👍 Easy to create and edit timers

Room to improve

  • 🐛 Occasional audio issues
  • 🔍 Limited Apple Watch integration
  • 💰 Paid version required for full functionality
  • 🕰️ Time-consuming to set up complex workouts

Sezzy Timer

From 100 App Store ratings

What we love

  • 👍 Simple and intuitive user interface
  • 🎵 Works seamlessly with background music (Spotify, Apple Music)
  • 🎤 Sarah's voice guidance is motivating and helpful
  • 💪 Perfect companion for Sarah's ebook workouts
  • ⏱️ Eliminates need to manually set up interval timers

Room to improve

  • 🐛 Timer frequently crashes or stops mid-workout
  • 🐛 Timer pauses when switching between apps
  • ⏰ Timer accuracy issues (runs slow or fast)
  • ❌ No back button to return to main menu
  • ❌ Cannot skip ahead if timer accidentally exits

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

Sezzy Timer

Reported bugs

14 issues
  • Timer stops or crashes mid-workout
  • Timer pauses when switching to other apps
  • Timer accuracy issues (runs faster or slower than expected)
  • App crashes when phone screen locks
  • Timer resets if accidentally navigate away
Show 9 more
  • Sarah's voice cuts off mid-announcement
  • Sarah's voice too quiet to hear over music
  • Screen doesn't rotate to landscape mode
  • Custom timer setup is confusing and unclear
  • Timer skips breaks or jumps between sections
  • App freezes or becomes unresponsive
  • Music stops playing when app opens
  • Countdown timer numbers partially hidden
  • Next exercise/round indicators reversed at bottom of screen

Requested features

13 requests
  • Apple Watch app support
  • Add 20-second rest period option
  • Save custom timer settings for reuse
  • Skip/fast-forward button to jump between sets
  • Back button to return to main menu
Show 8 more
  • Display exercise names instead of just numbers
  • Summary screen showing total workout time and circuits completed
  • Progress tracking and calendar logging
  • More rest/workout time increment options
  • Ability to skip rounds if timer glitches
  • Better custom timer UI with clearer instructions
  • Music volume ducking when Sarah speaks
  • Workout total time display for custom timers

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
None

Sezzy Timer

No in-app purchases

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is Sezzy Timer free?
Sezzy Timer costs $1.99, with no in-app purchases.
Which has better reviews, Seconds Interval Timer or Sezzy Timer?
Seconds Interval Timer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while Sezzy Timer averages 3.9 from 100 ratings.
Do Seconds Interval Timer or Sezzy Timer have ads?
Neither Seconds Interval Timer nor Sezzy Timer shows ads.
Which is updated more often, Seconds Interval Timer or Sezzy Timer?
Seconds Interval Timer ships an update monthly, and Sezzy Timer every 3 months. Most recently, Seconds Interval Timer was updated on September 26, 2026 and Sezzy Timer on September 23, 2026.

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