Interval Timer vs Kronos Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Interval Timer
This app is a versatile interval timer designed for various training styles like Tabata and HIIT. It offers customizable workout parameters, voice guidance, and music ducking for an enhanced training experience. Save your custom workouts and track your progress.
- Customizable interval settings
- Voice assistant with text-to-speech
- Music ducking for audio integration
- Save custom workouts
- Tabata, Rounds, Stopwatch modes
- Apple Health integration
Read full descriptionHide full description
Special timer for interval training. This Interval Timer offers: • Very intuitive interface. After installing this timer you need to press one button to start a tabata workout with classic settings. • Ability to set up prepare, work, rest, rest between sets, cool down time, number of cycles and sets. • Intervals can be configured individually. With this interval training timer you can create any interval workout with any sequence of intervals. • Voice assistant with text-to-speech. • Add descriptions to intervals that will be displayed on the timer screen and will be voiced. • Bright and nice colors. • Ability to lower the volume in your music player while playing the timer sounds (ducking). • List of your saved workouts. • NEW! Quick workout - setup your workout with fast and ease. The opportunity to display mode: - Tabata Protocol. - Rounds. - Stopwatch. - Intervals. Tabata is a form of high-intensity interval training (HIIT): • Workout hard for 20 seconds • Rest for 10 seconds • Complete 8 rounds It's time to train, good luck! Application supports Apple Health to track activity during workout. You can download the app for free. Further use requires a subscription. At our discretion, we may decide to offer you a free trial per the terms displayed in the app. Please note that: When opting for a subscription, you pay the fixed price for your country, which is displayed in the app. Payment will be charged to your Apple ID Account upon confirmation of purchase. Subscription automatically renews and free trial automatically converts into subscription unless auto-renewal is turned off at least 24 hours before the end of the current period. Your Account will be charged for renewal within 24 hours prior to the end of the current subscription period. You can manage your subscriptions and turn off auto-renewal by going to Account Settings after purchase. When canceling a subscription or a free trial, your subscription/free trial will stay active until the end of the current period. Auto-renewal will be disabled, but the current subscription will not be refunded. Terms of Use and Privacy Policy: https://docs.google.com/document/d/1FMzBsd_mSO69xuzkpOKljPPtxRMWMTzt2iGs6wJIhik
Kronos Studio
Read full descriptionHide full description
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.
Screenshots
Verdict
The clearest difference is update cadence: Kronos Studio at every 2 days against Interval Timer's every 4 weeks. Kronos Studio also leads on device support (3 vs 1). On price, ads, in-app purchases 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. Interval Timer sells 12 in-app purchases, starting at $1.99 per month and Kronos Studio sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.
Interval Timer ships an update every 4 weeks, Kronos Studio every 2 days. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.
| Parameter | Interval Timer | Kronos Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (3.5K ratings) — better | — |
| Positive reviews | 66.5% of reviews | — |
| Number of ratings | 3.5K — better | — |
| Update frequency | Every 4 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | — |
| Devices | iPhone | iPhone, iPad, Apple Watch — better |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 243 MB | 97 MB |
| Age rating | 4+ | 12+ |
| Developer | HIIT Apps Sp. z o.o. | Muller Labs LLC |
Bugs and requests
Interval Timer
Reported bugs
3 issues- Workouts disappearing
- App crashes and freezes
- Timing issues with intervals
Requested features
4 requests- Apple Watch integration
- More customization options
- Additional audio cues and prompts
- Improved workout tracking and history
Kronos Studio
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Interval Timer
- Intervals: monthly membership7 Days trial$1.991 Month
- Intervals: membership7 Days trial$3.993 Months
- Intervals: monthly membership$4.991 Month
Show 5 moreShow fewer
- Intervals: yearly membership$6.991 Year
- Intervals: yearly membership1 Year trial$9.991 Year
- Intervals: yearly membership7 Days trial$19.991 Year
- Intervals: yearly membership7 Days trial$24.991 Year
- Intervals: membership7 Days trial$24.991 Year
- Intervals | PRO version$14.99
- Intervals | Membership$14.99
- Intervals | Membership$34.99
Show 1 moreShow fewer
- Intervals | Membership$39.99
Kronos Studio
- Kronos Pro Monthly$8.991 Month
- Kronos Pro Yearly$49.991 Year
Questions
Is Interval Timer free?
Is Kronos Studio free?
Do Interval Timer or Kronos Studio have ads?
Which is updated more often, Interval Timer or Kronos Studio?
Other comparisons















