Comparison

Seconds Pro Interval Timer vs ClassBuzz

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

ClassBuzz

Create and personalize social media content to promote yourself and your Zumba classes. Access exclusive Zumba-branded assets like images, videos, and animations to design engaging posts.

Highlights
  • Personalize social media content
  • Exclusive Zumba-branded assets
  • Template-based post creation
  • Customizable posts with text and stickers
  • Direct social media sharing
Features
Read full description

Ready to create some buzz? Market yourself on social media like a pro with ClassBuzz, the mobile app exclusively for members of the Zumba® Instructor Network! Now you can easily create + personalize content promoting yourself and your Zumba® classes! Explore your creativity with exclusive Zumba® branded content including images, videos, animations, memes, patterns, and more! HOW CLASSBUZZ WORKS: 1. Choose A Template Pick from class, event, or meme templates. Or, build your post from scratch with a blank canvas! 2. Add Backgrounds, Stickers + Text Choose a background and personalize your post with text… then, bring it to life with official Zumba® stickers and GIFs! 3. Share To Social Click to share your post with your students and followers across all social platforms.

Screenshots

Seconds Pro Interval Timer4 screens
ClassBuzz4 screens

Verdict

The call

The clearest difference is price: ClassBuzz at Free against Seconds Pro Interval Timer's $7.99. ClassBuzz also leads on iOS requirement (16.4 vs 18.0). Seconds Pro Interval Timer's advantage is review sentiment (80% vs 36%) and rating (4.8 vs 4.1). On ads and in-app purchases 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

ClassBuzz 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 4.1. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 63, 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 36% of ClassBuzz's.

UpkeepUpdate frequency

Seconds Pro Interval Timer ships an update fortnightly, ClassBuzz every 5 weeks. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

Scorecard9 real differences · 2 level
Seconds Pro Interval Timer versus ClassBuzz: the parameters behind the verdict, then further details
ParameterSeconds Pro Interval TimerClassBuzz
Price$7.99Free — better
Rating4.8 (12K ratings) — better4.1 (63 ratings)
Positive reviews79.9% of reviews — better36.4% of reviews
Number of ratings12K — better63
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#9 — better
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.016.4 — better
Further details — not scored
Size94 MB53 MB
Age rating4+4+
DeveloperRunloop LtdZumba Fitness

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%

ClassBuzz

All ratings63 ratings
Positive74.6%
Neutral7.9%
Negative17.5%
Written reviews44 reviews
Positive36.4%
Neutral20.5%
Negative43.2%

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

ClassBuzz

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Seconds Pro Interval Timer

No in-app purchases

None

ClassBuzz

No in-app purchases

Questions

Is Seconds Pro Interval Timer free?
Seconds Pro Interval Timer costs $7.99, with no in-app purchases.
Is ClassBuzz free?
ClassBuzz is free to download, with no in-app purchases.
Which has better reviews, Seconds Pro Interval Timer or ClassBuzz?
Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while ClassBuzz averages 4.1 from 63 ratings.
Do Seconds Pro Interval Timer or ClassBuzz have ads?
Neither Seconds Pro Interval Timer nor ClassBuzz shows ads.
Which is updated more often, Seconds Pro Interval Timer or ClassBuzz?
Seconds Pro Interval Timer ships an update fortnightly, and ClassBuzz every 5 weeks. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and ClassBuzz on September 20, 2026.

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