Comparison

Seconds Pro Interval Timer vs In

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

Head to head
About

Seconds Pro Interval Timer

This interval timer app is designed for high-intensity interval training (HIIT), Tabata, and circuit training workouts. It features a large, color-coded display, customizable interval names, and background operation. It also integrates with Apple Health to track your fitness data.

Highlights
  • Full screen colored display
  • Templates for HIIT, Tabata, Circuit Training
  • Speaks interval names and provides warnings
  • Assign music per interval
  • Runs in background
  • Share interval timers
  • Apple Health integration
Features
Read full description

Seconds Pro 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 Pro 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 Pro reads your body measurements and year of birth from Health to estimate calories burned. PAID ONCE, NOTHING TO UNLOCK - Seconds Pro is paid for up front. Every feature is included and every timer you make can be run as many times as you like. SECONDS AND SECONDS PRO - Seconds is the free version of this app. It has the same features, but each timer locks after one run until a single in-app purchase unlocks it. 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

In

This app connects users with certified personal trainers for booking sessions, tracking workouts, and receiving custom plans. It facilitates communication with trainers and helps users monitor progress towards their fitness goals, whether for weight loss, muscle gain, or general health.

Highlights
  • Book training sessions
  • Track workouts
  • Custom workout plans
  • Trainer communication
  • Progress tracking
  • Session scheduling
Features
Read full description

The In-Shape Personal Training App Book sessions, track workouts, and stay connected with your trainer—all in one place. Whether you’re crushing fitness goals, staying active, or just starting your fitness journey, the In-Shape Personal Training App is your guide to a healthier, stronger you. Key Features: - Easy Booking: Book training sessions with top Certified Personal Trainers in just a few taps. - Clear Scheduling: Keep track of your upcoming sessions with a simple overview, so you never miss an appointment. - Trainer Communication: Receive instant updates, reminders, and messages from your trainer. - Reach Your Fitness Goals Faster: Receive custom workout plans tailored to your unique goals and track your progress along the way. Whether you're aiming for weight loss, muscle gain, or simply a healthier lifestyle, the In-Shape Personal Training App makes it easier than ever to stay on track and achieve your goals. Download today!

Screenshots

Seconds Pro Interval Timer4 screens
In4 screens

Verdict

The call

The clearest difference is review sentiment: Seconds Pro Interval Timer at 80% against In's 20%. Seconds Pro Interval Timer also leads on rating (4.8 vs 4.0) and ratings volume (12K vs 13). In's advantage is price (Free vs $7.99) and iOS requirement (15.0 vs 18.0). On update cadence, 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

In is free to download; Seconds Pro Interval Timer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Seconds Pro Interval Timer holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 80% of Seconds Pro Interval Timer's written reviews are positive against 20% of In's.

UpkeepUpdate frequency

Seconds Pro Interval Timer ships an update fortnightly, In every 11 days. The most recent releases landed on September 24, 2026 and September 4, 2026 respectively.

Scorecard7 real differences · 4 level
Seconds Pro Interval Timer versus In: the parameters behind the verdict, then further details
ParameterSeconds Pro Interval TimerIn
Price$7.99Free — better
Rating4.8 (12K ratings) — better4.0 (13 ratings)
Positive reviews79.9% of reviews — better20.0% of reviews
Number of ratings12K — better13
Update frequencyFortnightlyEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#10 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size94 MB163 MB
Age rating4+4+
DeveloperRunloop LtdInShape Health Clubs LLC

Customer experience

Seconds Pro Interval Timer

All ratings12,056 ratings
Positive94.7%
Neutral1.9%
Negative3.4%
Written reviews1,499 reviews
Positive79.9%
Neutral6.0%
Negative14.1%

In

All ratings13 ratings
Positive76.9%
Neutral0.0%
Negative23.1%
Written reviews5 reviews
Positive20.0%
Neutral0.0%
Negative80.0%

Bugs and requests

Seconds Pro Interval Timer

Reported bugs

4 issues
  • Intervals randomly pausing or skipping
  • Music volume issues when launching the app
  • Inconsistent audio cues and countdown
  • Sync issues between devices

Requested features

6 requests
  • Ability to lock Apple Watch screen
  • Option to see more than just the next exercise
  • Fractional time settings (e.g. 7.74 seconds)
  • More voice/audio customization options
  • Improved sync between iPhone and iPad
Show 1 more
  • Calendar integration to track workouts

In

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Seconds Pro Interval Timer

No in-app purchases

None

In

No in-app purchases

Questions

Is Seconds Pro Interval Timer free?
Seconds Pro Interval Timer costs $7.99, with no in-app purchases.
Is In free?
In is free to download, with no in-app purchases.
Which has better reviews, Seconds Pro Interval Timer or In?
Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while In averages 4.0 from 13 ratings.
Do Seconds Pro Interval Timer or In have ads?
Neither Seconds Pro Interval Timer nor In shows ads.
Which is updated more often, Seconds Pro Interval Timer or In?
Seconds Pro Interval Timer ships an update fortnightly, and In every 11 days. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and In on September 4, 2026.

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