Kronos Studio vs Sloth
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.
Sloth
Discover outdoor calisthenics spots worldwide, track your progress across various skill trees, and connect with a local training community. Build custom workout plans or import them with AI assistance to achieve your fitness goals.
- Global calisthenics park map
- Skill progression tracking
- Customizable workout programs
- AI routine importer
- Social park chats
- Personal record tracking
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Sloth: Calisthenics & Street Workout Every park. Every skill. Every rep. Sloth turns bodyweight training into a world worth exploring. Find a pull-up bar within walking distance, level up real skills, and meet the crew that already trains where you do. Find your park Browse 23,000+ public calisthenics spots on a global map. Pull-up rigs, rings, parallel bars, full outdoor parks, all pinned. Tap any spot to see who trains there, recent photos, and what gear it has. Climb seven skill trees Push, Pull, Core, Legs, Mobility, Hand Balance, and Hardcore. Each skill ladders from beginner gateways to the moves you actually want: muscle-up, front lever, freestanding handstand, pistol squat, human flag. Earn bronze, silver, gold, and diamond trophies as your reps and holds go up. No fake numbers, no broken progressions. Programs that fit you Pick a built-in program, build your own in the editor, or paste any routine from the internet and let the AI importer turn it into a real, trackable plan. Every set you finish feeds XP into your Discipline level and your streak. Show up together One chat per park. See who is heading to the bar tonight, who is in town this week, and who is grinding the same skill you are. Follow athletes, share clips, drop in on the city feed. Track what matters Personal records, weekly volume, completion streaks, and a clean history of every session. Verify big lifts and holds to earn mastery trophies that stick to your profile. Train outside. Get strong with people, not algorithms. Terms of service: https://www.calisloth.com/landing/policy/tos Privacy Policy: https://www.calisloth.com/landing/policy/privacy-policy
Screenshots
Verdict
The clearest difference is update cadence: Kronos Studio at every 3 days against Sloth's every 8 days. On price, 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
Both are free to download. Kronos Studio sells 2 in-app purchases, starting at $8.99 per month and Sloth sells 7 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Kronos Studio ships an update every 3 days, Sloth every 8 days. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | Kronos Studio | Sloth |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (16 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 16 — better |
| Update frequency | Every 3 days — better | Every 8 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 102 MB | 126 MB |
| Age rating | 12+ | 12+ |
| Developer | Muller Labs LLC | Poxi AS |
In-app purchases
Kronos Studio
- Kronos Pro Monthly$8.991 Month
- Kronos Pro Yearly14 Days trial$49.991 Year
Sloth
- Pro Plan3 Days trial$6.997 Days
- Pro Plan$8.997 Days
- Pro Yearly$14.991 Year
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- Pro Plan$29.991 Year
- Pro Plan7 Days trial$59.991 Year
- Verification Token$39.99
- Sloth Lifetime Pro$79.99









