Comparison

Kronos Studio vs AmpHIIT

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

Head to head
About

Kronos Studio

Features
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Real strength workouts, written for the gear you've got and the 30 minutes you have. Open Kronos and today's session is ready: exercises, sets and the weights filled in, built for the equipment in front of you and the minutes you named. Different every time, shaped to your gear, your time, and how you actually feel today. You don't need more motivation. You need fewer decisions. IT ALREADY KNOWS • It already knows what's at your gym. • It already knows you only have 20 minutes. • It already knows you skipped Tuesday. • It already knows you hated lunges last time. • It already knows you've done legs twice this week. So you don't have to. HOW ONE TAP WORKS BUILT AROUND YOUR ACTUAL GEAR. A pair of dumbbells, a full gym, or nothing at all: tell Kronos what you have and it never writes a workout that needs a cable machine someone else is on. It fills in the weight, too, instead of leaving you a blank. HOTEL ROOM? HOTEL WORKOUT. Save your spots: gym, home, hotel, the park. Switch in one tap and the workout reshapes itself. Flag an injury once and it plans around that too. SWIPE EXERCISES, NOT EX'S. Love it, like it, meh, never again. Every swipe trains the next workout. PROGRAMS THAT BEND. Seventeen programs, 2 to 8 weeks each, written for your gear and shaped to your week instead of the other way round. The first session of every one is free. Any day you'd rather not be on one, build a single session instead. TRAIN WITH YOUR CREW Start a challenge, drop the code in the group chat, and every finished day puts your name on the Wall beside theirs. Pick a shape: a daily target, a ladder, a weekly max test, or just show up. Wildcards cover a missed day, streaks carry, and nobody gets a notification about your rest day. It's the part that makes people keep going, and it isn't a leaderboard for strangers. It's five people you already know. A BIG CALM TIMER We tell you what's next; you just lift. No tapping mid-set. Then swipe: right to keep, left for never again. Benchmarks are in there too. Cindy, Murph, and 42 more, each one scaled to the kit you actually own instead of the kit the workout assumed. LOGGING, WHEN YOU WANT IT Log a set if you want the number. Skip it if you don't. Your week, your lifts, and your history are there when you go looking, and never the price of getting a workout. PLUS A FREE INTERVAL TIMER. ACTUALLY FREE. HIIT, Tabata, EMOM, AMRAP, plus full custom intervals. Save unlimited presets. The screen stays awake, the cues mix over your music, and there are no ads. No account needed, no "Pro timer" upsell. Not now, not ever. WHAT WE BELIEVE Variety beats optimization. Constraints are features. Decisions are willpower taxes. Today's mood matters. Adherence beats intensity. Fun is a strategy. A B+ workout four days a week beats an A+ workout once. Every time. KRONOS PRO Free is the interval timer, forever, plus five workouts written for your gear and the first session of every program. Pro is the rest: a new workout every day you open the app, every session of all 17 programs, your whole history scored, up to 10 challenges at once, and crew insights. Prices are shown in the app and may vary by region. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms: https://getkronos.app/terms Privacy: https://getkronos.app/privacy Most fitness apps make you a workout plan. Kronos makes you a person who works out. The best workout is the one you'll actually do.

About

AmpHIIT

Features
Read full description

AmpHIIT is a simple, focused HIIT and Tabata interval timer built for fast workouts, circuit training, cardio sessions, and at-home exercise. Set your prepare, work, and rest times, choose the number of exercises, and let AmpHIIT guide your workout with clear visual phases, optional voice coaching, and countdown beeps. Whether you are doing Tabata rounds, bodyweight circuits, cardio intervals, stretching routines, or quick daily workouts, AmpHIIT keeps the timing easy so you can focus on moving. Features: • Custom prepare, work, and rest timers • Adjustable number of exercises • Clear workout phase display • Optional voice coaching • Optional countdown beeps • Clean, distraction-free interface • Simon Says workout mode • Screen-awake support during active workouts • Local settings saved on your device • No account required • No ads • No tracking • Optional Tip Jar using Apple In-App Purchase AmpHIIT is designed to be lightweight, private, and easy to use. There are no accounts, no subscriptions, no ads, and no third-party analytics. Your workout settings stay on your device. AmpHIIT is a fitness timer, not medical advice. Exercise within your limits and consult a qualified professional before starting a new workout program.

Screenshots

Kronos Studio4 screens
AmpHIIT4 screens

Verdict

The call

The clearest difference is device support: Kronos Studio at 3 against AmpHIIT's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Kronos Studio sells 2 in-app purchases, starting at $8.99 per month and AmpHIIT sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference Ā· 5 level
Kronos Studio versus AmpHIIT: the parameters behind the verdict, then further details
ParameterKronos StudioAmpHIIT
PriceFreeFree
Update frequencyEvery 2 days—
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS16.4 — better17.6
Further details — not scored
Size97 MB7 MB
Age rating12+4+
DeveloperMuller Labs LLCSteven Mayer

In-app purchases

2 purchases

Kronos Studio

Subscriptions2
  • Kronos Pro Monthly$8.991 Month
  • Kronos Pro Yearly$49.991 Year
3 purchases

AmpHIIT

One-time3
  • AmpHIIT$0.99
  • AmpHIIT$1.99
  • AmpHIIT$3.99

Questions

Is Kronos Studio free?
Kronos Studio is free to download, with in-app purchases available.
Is AmpHIIT free?
AmpHIIT is free to download, with in-app purchases available.
Do Kronos Studio or AmpHIIT have ads?
Neither Kronos Studio nor AmpHIIT shows ads.

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