Kronos Studio vs HIIT Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kronos Studio
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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.
HIIT Timer
This interval training app provides voice-guided workouts for Tabata, EMOM, Circuit, and custom routines. It allows users to focus on their exercises without constantly checking their screen, with features like saved workouts and workout history.
- Voice announcements for workout cues
- Multiple training modes (Tabata, EMOM, Circuit, Custom)
- Save and replay custom workouts
- Workout history tracking
- Independent sound, haptic, and voice controls
- Music integration with voice cues
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HIIT Timer is a fast, focused interval timer for people who want to train, not fiddle with settings. Pick a mode, hit start, and let the app call out every work and rest period so you can keep your eyes off the screen and on the set. FOUR WAYS TO TRAIN Tabata. Classic high intensity intervals with ready made protocols. EMOM. Every minute on the minute. Name your exercises, do your reps, rest whatever time is left. Circuit. Set your stations, work time, rest time, and rounds, then go. Custom. Build your own workout from scratch. Name every exercise, set work and rest for each one, reorder them, and choose your rounds. BUILT FOR REAL WORKOUTS • Voice announcements call out each exercise, so you never look at your phone mid set • Type your times directly, or tap to adjust, whichever is faster • Save any workout and start it again in one tap • History tracks completed workouts, total minutes, and exercises done • Sound, haptics, and voice each turn on or off independently • Your music keeps playing, cues mix over the top • Screen stays awake through a workout • Optional pause when you leave the app • Dark mode COMPLETELY FREE No ads. No subscriptions. No paid unlocks. No account to create. Every feature is there the moment you install. YOUR DATA STAYS YOURS HIIT Timer collects nothing. Your workouts, history, and settings live on your device and nowhere else.
Screenshots
Verdict
The clearest difference is in-app purchases: HIIT Timer at none against Kronos Studio's 2. Kronos Studio's advantage is update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement 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
Both are free to download. Kronos Studio sells 2 in-app purchases, starting at $7.99 per month. HIIT Timer asks for nothing beyond the download.
Kronos Studio ships an update every 2 days, HIIT Timer fortnightly. The most recent releases landed on September 18, 2026 and September 10, 2026 respectively.
| Parameter | Kronos Studio | HIIT Timer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 97 MB | 37 MB |
| Age rating | 12+ | 4+ |
| Developer | Muller Labs LLC | ANNR Studio |
In-app purchases
Kronos Studio
- Kronos Pro Monthly$7.991 Month
- Kronos Pro Yearly7 Days trial$79.991 Year
HIIT Timer
No in-app purchases





