Comparison

Interval Timer HIIT Workout vs Big Sendies

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

Head to head
About

Interval Timer HIIT Workout

This app provides customizable interval timers for HIIT, Tabata, and circuit training. It features AI voice cues from celebrity impersonations, music integration, and automatic syncing with Apple Health and Apple Watch for comprehensive workout tracking.

Highlights
  • Customizable HIIT & Tabata timers
  • AI voice cues from celebrity impersonations
  • Music integration without interruption
  • Convert social media workouts to follow-alongs
  • Syncs with Apple Health & Apple Watch
  • Save and organize custom workouts
  • On-screen exercise cues
Features
Read full description

The ultimate Interval Timer for your HIIT Workouts and Tabata training! Our app is the perfect Workout Timer, offering customizable work/rest periods for High Intensity Interval Training, Tabata, Running, Boxing and circuit training. Achieve peak interval performance with our EXCLUSIVE AI Voice Cues (feat. Arnold, Snoop & The Rock) that keep you motivated without interrupting your music! Why this timer? We added voice cues from AI versions of Arnold Schwarzenegger, Snoop Dogg, and The Rock. Because honestly, who wouldn't want Arnold yelling "PUMP UP THOSE MUSCLES" between sets when you're still wondering "WTF was I thinking doing this workout"? - TURN INSTAGRAM & TIKTOK WORKOUTS INTO FOLLOW-ALONGS. Share any workout post or reel to Peak Interval and it becomes a timed follow-along - exercise clips, reps, rounds and rest all set up for you. Finally, a use for all those workouts you saved "for later". - CUSTOMIZABLE WORKOUTS: Tailor your interval timer for any HIIT, Tabata, or circuit training session. - MUSIC INTEGRATION. Your music keeps playing while the cues run during your interval timer training - no interruptions. Who are we to judge what you listen to? - AI VOICE QUEUES. Get motivated by AI Arnold, Snoop Dogg, & The Rock for a truly fun workout timer experience. - LOCKED SCREEN MODE. Cues still play even when your phone is locked—because you shouldn't have to keep your screen on. You need to save that battery % for all that social media scrolling. - APPLE HEALTH & APPLE WATCH. Your workouts automatically sync to Apple Health with live heart rate monitoring and heart rate zones right on screen. Start a workout on your iPhone and your Watch joins in automatically. Your calories, duration, and heart rate — all tracked, all saved, zero effort. - SAVE AND ORGANIZE INTERVAL TIMER WORKOUTS. color-coded, named, and ready for quick access. Easiest thing about your workout is going to be starting the timer - the workout itself - not so much. - BIG CLEAR NUMBERS WITH COLOR CODED SCREENS - so you can see your time from a distance. Like across the gym. - REAL TIME EXERCISE ON-SCREEN CUES—enter your exercise names, and they'll show up on-screen during interval timer workouts and announce what's coming next during rest. At that point you may regret adding one extra round. - SHARE WORKOUTS WITH OTHERS – perfect for coaches with clients. Or that friend that needs to lay off donuts and do some serious sweating. Perfect for: - Interval timer training - High-Intensity Interval Training (HIIT timer training) - Tabata timer workouts - Circuit training & CrossFit - Boxing/MMA training - Strength training & cardio - Personal trainers & group fitness - Interval timer running - Forcing yourself to take a break while bindge watching Netflix (for real, you can put 40 minutes "work" and 5 minutes "rest"). Again, no judgement zone, you do what you want. Still reading? Just download. See the app for yourself.

About

Big Sendies

Features
Read full description

Big Sendies is a climbing logbook built for the gym and the crag. TRACK EVERY SESSION Start a session on your iPhone or Apple Watch and log each climb as you go: grade, style (bouldering, top rope, lead), falls and how you sent it, from flash and onsight to project. Heart rate, calories and height climbed are recorded automatically and show up on your phone as soon as each climb ends. Sessions are saved to Apple Health as workouts. ON YOUR LOCK SCREEN A Live Activity keeps your session on the Lock Screen and in the Dynamic Island: time, climbs, sends and your hardest grade, with an End button when you're done. KNOW WHAT YOU'VE CLIMBED Your route logbook shows every route you've climbed, sortable and searchable, with each attempt and when you first sent it. When you pick a route while logging, you'll see if you've done it before. WATCH YOUR GRADES GO UP Charts and a grade pyramid show your progress over time. Earn achievements as you climb. CLIMB WITH FRIENDS Add friends, follow their sessions in the activity feed, and cheer their sends. BUILT FOR IPHONE DUO Unfold it to see your sessions and routes side by side with their details. FREE AND PRO Log up to 30 climbs a month for free. Big Sendies Pro removes the limit: $2.99/month or $24.99/year. JUST ASK SIRI "Start a Big Sendies session." "Have I sent Blue Crush?" "When did I last climb at my gym?" Start and end sessions, hear a recap, or check a route's history hands-free. Your sessions, routes and gyms show up in Spotlight too. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bigsendies.com/privacy.html

Screenshots

Interval Timer HIIT Workout4 screens
Big Sendies4 screens

Verdict

The call

The clearest difference is ads: Big Sendies at none against Interval Timer HIIT Workout's shown. On price, update cadence, 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

Both are free to download. Interval Timer HIIT Workout sells 5 in-app purchases, starting at $1.99 per month and Big Sendies sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval Timer HIIT Workout ships an update every 6 days, Big Sendies every 4 days. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

Scorecard1 real difference · 9 level
Interval Timer HIIT Workout versus Big Sendies: the parameters behind the verdict, then further details
ParameterInterval Timer HIIT WorkoutBig Sendies
PriceFreeFree
Rating4.8 (347 ratings) — better—
Positive reviews63.2% of reviews—
Number of ratings347 — better—
Update frequencyEvery 6 daysEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS18.017.6 — better
Further details — not scored
Size99 MB34 MB
Age rating4+4+
DeveloperRoli LLCJust Go Up LLC

In-app purchases

5 purchases

Interval Timer HIIT Workout

Subscriptions4
  • Monthly Subscription7 Days trial$1.991 Month
  • Monthly Subscription$2.991 Month
  • Yearly Subscription1 Year trial$29.991 Year
Show 1 more
  • Yearly Subscription7 Days trial$29.991 Year
One-time1
  • One Time Purchase$19.99
2 purchases

Big Sendies

Subscriptions2
  • Big Sendies Pro$2.991 Month
  • Big Sendies Pro (Annual)$24.991 Year

Questions

Is Interval Timer HIIT Workout free?
Interval Timer HIIT Workout is free to download, with in-app purchases available.
Is Big Sendies free?
Big Sendies is free to download, with in-app purchases available.
Do Interval Timer HIIT Workout or Big Sendies have ads?
Interval Timer HIIT Workout shows ads; Big Sendies does not.
Which is updated more often, Interval Timer HIIT Workout or Big Sendies?
Interval Timer HIIT Workout ships an update every 6 days, and Big Sendies every 4 days. Most recently, Interval Timer HIIT Workout was updated on November 12, 2026 and Big Sendies on November 13, 2026.

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