Seconds Pro Interval Timer vs Sharper Image Smart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Sharper Image Smart
This application enables multiple household members to set and monitor weight loss objectives. It utilizes Bluetooth technology for seamless tracking and can sync data with the Apple Health app if authorized.
- Multiple user support
- Weight loss goal setting
- Bluetooth tracking
- Apple Health sync
- Effortless tracking
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Tracker Scale app. This free app allows multiple users in your household to set goals and track weight loss effortlessly through Bluetooth technology. This app support the Apple 'Health' App, If you authorized, we can sync all weight data to you Health app.
Screenshots
Verdict
The clearest difference is review sentiment: Seconds Pro Interval Timer at 80% against Sharper Image Smart's 9%. Seconds Pro Interval Timer also leads on rating (4.8 vs 1.7) and ratings volume (12K vs 244). Sharper Image Smart's advantage is price (Free vs $7.99) and iOS requirement (8.0 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
Sharper Image Smart 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.
Seconds Pro Interval Timer holds the better App Store score, 4.8 against 1.7. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 244, 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 9% of Sharper Image Smart's.
Seconds Pro Interval Timer ships an update fortnightly, Sharper Image Smart every 10 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.
| Parameter | Seconds Pro Interval Timer | Sharper Image Smart |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 4.8 (12K ratings) — better | 1.7 (244 ratings) |
| Positive reviews | 79.7% of reviews — better | 8.7% of reviews |
| Number of ratings | 12K — better | 244 |
| Update frequency | Fortnightly | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #7 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 18.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 94 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Runloop Ltd | MerchSource, LLC |
Customer experience
Seconds Pro Interval Timer
Sharper Image Smart
User reviews
Seconds Pro Interval Timer
From 12K App Store ratingsWhat we love
- ⭐ Great updates
- 🤖 Amazing voice prompts
- 👍 Easy to use
- 🎨 Highly customizable
- 🔧 Versatile for various workouts
Room to improve
- 🐛 Occasional bugs and glitches
- 🔌 Music volume issues
- 🔍 Complicated setup for some features
- 🌐 Sync/sharing issues between devices
- 🔇 Inconsistent audio cues
Sharper Image Smart
From 244 App Store ratingsWhat we love
- 🚀 Consistent and detailed
- 💡 Good functionality
Room to improve
- 🐛 Impedance error
- 🐛 Bluetooth connectivity issues
- 🐛 Fails to save/sync data
- 🐛 Doesn't calculate all metrics
- 🐛 Stuck on kilograms
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
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- Calendar integration to track workouts
Sharper Image Smart
Reported bugs
3 issues- App crashes
- Doesn't work with latest iOS
- Doesn't save weight/body composition data
Requested features
3 requests- Ability to export data
- Stay logged in
- Half-inch height options
In-app purchases
Seconds Pro Interval Timer
No in-app purchases
Sharper Image Smart
No in-app purchases
Questions
Is Seconds Pro Interval Timer free?
Is Sharper Image Smart free?
Which has better reviews, Seconds Pro Interval Timer or Sharper Image Smart?
Do Seconds Pro Interval Timer or Sharper Image Smart have ads?
Which is updated more often, Seconds Pro Interval Timer or Sharper Image Smart?
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