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 helps certified personal trainers manage client sessions, training packages, and client insights. It streamlines scheduling and creates a professional experience for trainers focused on delivering results.

Highlights
  • Streamlined session scheduling
  • Client profile management
  • Training package creation
  • Availability tracking
  • Appointment management
Features
Read full description

The In-Shape Trainer App The In-Shape Trainer App is your go-to tool for managing sessions, clients, and training packages effortlessly. Built exclusively for Certified Personal Trainers at In-Shape, it’s designed to make life easier, and keep you organized and focused on delivering exceptional results. Key Features: - Streamlined Scheduling: Book and update sessions with ease, while keeping track of your availability and appointments. - Client Insights: Access comprehensive client profiles, including session details and training plans. - PT Packages: Send personalized training packages for purchase, directly within the app. Why Trainers Love It: - Exclusively designed for the trainers at In-Shape. - Keeps you organized and saves time. - Creates a smooth and professional experience. Download In-Shape Trainer App today and streamline your day-to-day tasks while delivering great results for your clients.

Screenshots

Seconds Pro Interval Timer4 screens
In4 screens

Verdict

The call

The clearest difference is price: In at Free against Seconds Pro Interval Timer's $7.99. In also leads on iOS requirement (15.0 vs 18.0). Seconds Pro Interval Timer's advantage is rating (4.8 vs 3.7) and ratings volume (12K vs 9). 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 3.7. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 9, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 24, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 5 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) — better3.7 (9 ratings)
Positive reviews79.9% of reviews—
Number of ratings12K — better9
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#8 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size94 MB164 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 ratings9 ratings
Positive55.6%
Neutral22.2%
Negative22.2%

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 3.7 from 9 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 fortnightly. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and In on September 19, 2026.

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