Comparison

Seconds Pro Interval Timer vs Instruct

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

Instruct

This app helps group fitness instructors quickly plan, design, and choreograph classes. It offers an AI-powered bot to generate custom workouts, a smart library for organizing past classes, and automatic timer integration. Spend less time planning and more time teaching.

Highlights
  • On-demand Class Builder Bot
  • Smart Library for past classes
  • Automatic timer integration
  • Review and edit class flow
  • Save and reuse workout templates
  • Instructor-first interface
Features
Read full description

Instruct is an AI-powered interval timer built for group fitness instructors. Plan, program, and run your classes in seconds—without manual setup. Using the most advanced AI, you can now build workouts, time intervals, and organize your templates in seconds. Timing your fitness classes just got easier: Instant Class Programming Turn ideas into fully structured interval timers: Prompt: “30-min HIIT with dumbbells + core” → ready-to-run timer AI Interval Timer Engine Automatically builds work/rest blocks, circuits, and workout flows for HIIT, Cycling, Bootcamp, Boxing, Treadmill, Rowing, TRX, Strength, Pilates, etc. Template to Timer Conversion Already have your class plan? Upload or reuse class templates → instantly converted into timed intervals Real-Time Class Runtime Run your class with beeps, voice cues, and seamless transitions No Timer Setup Required Skip manual interval programming completely. Instruct fills in time, exercise, and description in seconds. Smart Class Library Store, remix, and regenerate workouts from past classes Built for How You Actually Teach Supports HIIT, strength, bootcamp, cycling, conditioning, boxing, pilates, yoga, aquafit, and more. Audio & Compatibility Works alongside your music apps (Spotify, FitRadio, SoundCloud, PowerMusic, Apple Music, etc.) Does not interrupt music playback Choose voice cues, beeps, or silent transitions Instruct is a subscription-based app. There is no free or limited mode—an active subscription is required to use all features, including class builders and timers. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://instructgroupfitness.com/privacy

Screenshots

Seconds Pro Interval Timer4 screens
Instruct4 screens

Verdict

The call

The clearest difference is price: Instruct at Free against Seconds Pro Interval Timer's $7.99. Instruct also leads on review sentiment (100% vs 80%) and rating (5.0 vs 4.8). Seconds Pro Interval Timer's advantage is in-app purchases (none vs 2) and ratings volume (12K vs 5). 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

Instruct is free to download; Seconds Pro Interval Timer costs $7.99 up front. Instruct sells 2 in-app purchases, starting at $2.99 per 7 days. Seconds Pro Interval Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Instruct holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 5, 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 100% of Instruct's.

UpkeepUpdate frequency

Seconds Pro Interval Timer ships an update fortnightly, Instruct every 2 months. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

Scorecard9 real differences · 2 level
Seconds Pro Interval Timer versus Instruct: the parameters behind the verdict, then further details
ParameterSeconds Pro Interval TimerInstruct
Price$7.99Free — better
Rating4.8 (12K ratings)5.0 (5 ratings) — better
Positive reviews79.7% of reviews100.0% of reviews — better
Number of ratings12K — better5
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
Best chart rank#10 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.014.0 — better
Further details — not scored
Size94 MB42 MB
Age rating4+17+
DeveloperRunloop LtdInstruct

Customer experience

Seconds Pro Interval Timer

All ratings12,104 ratings
Positive94.7%
Neutral1.9%
Negative3.4%
Written reviews1,520 reviews
Positive79.7%
Neutral6.0%
Negative14.3%

Instruct

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Instruct

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Seconds Pro Interval Timer

No in-app purchases

2 purchases

Instruct

Subscriptions2
  • Weekly Pro Access (Instruct +)7 Days trial$2.997 Days
  • Monthly Pro Access (Instruct +)7 Days trial$7.991 Month

Questions

Is Seconds Pro Interval Timer free?
Seconds Pro Interval Timer costs $7.99, with no in-app purchases.
Is Instruct free?
Instruct is free to download, with in-app purchases available.
Which has better reviews, Seconds Pro Interval Timer or Instruct?
Instruct is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while Instruct averages 5.0 from 5 ratings.
Do Seconds Pro Interval Timer or Instruct have ads?
Neither Seconds Pro Interval Timer nor Instruct shows ads.
Which is updated more often, Seconds Pro Interval Timer or Instruct?
Seconds Pro Interval Timer ships an update fortnightly, and Instruct every 2 months. Most recently, Seconds Pro Interval Timer was updated on October 14, 2026 and Instruct on September 30, 2026.

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