Comparison

Kairos vs RoxSIM

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

Head to head
About

Kairos

Features
Read full description

Kairos: Interval Timer helps you stay consistent and make the most of your time at the gym. Plan your workout, customise every interval, and know exactly what to do next. No guessing, no wasted time — just start and train. • Custom work, rest, warmup & cooldown intervals • Track exercises, weights, reps & sets • Save workouts and reuse them anytime • See your workout history and progress Spend less time figuring out your workout. More time training. Want to see a new feature added? Use the contact details within the app to let us know! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

RoxSIM

Features
Read full description

RoxSIM is the first race simulator built for HYROX and DEKA athletes. Simulate full events with accurate run/station splits, real-time pacing guidance, transition enforcement, audio coaching, fatigue tracking, and performance analytics—so you train like race day, not guesswork. Prepare for HYROX and DEKA formats (Strong, Mile, Fit) with realistic simulations of run segments, sled push/pull, burpee broad jumps, row, SkiErg, AirBike, farmer’s carry, wall balls, lunges, med-ball work, and transitions. Get prompts like “Slow run pace 8%” or “You’re 10s ahead of last DEKA sim” to keep you on strategy. Core features HYROX & DEKA race simulations (Strong, Mile, Fit) - Real-time pacing guidance & audio coaching - Precise run/station split tracking & race time prediction - Fatigue/efficiency modeling and transition timing - Custom simulation builder & training history - Strategy planning: identify weak segments, balance strength vs endurance Why it matters - Train with exact race structure: loads, sequencing, pacing, fatigue patterns - Enforce transitions (no cheating) and manage energy like on-course - Improve where you actually lose time, not with random workouts Built for - HYROX athletes, DEKA Strong/Mile/Fit competitors, hybrid fitness racers, coaches, and anyone who needs a true race simulator instead of a basic timer. Any setup, anywhere - Gym, studio, garage, or limited equipment - RoxSIM adapts. Simulate sleds, carries, wall balls, and runs with alternatives so you can prep anytime. Stop guessing readiness. Start training like you’ve already seen the course. Download RoxSIM and get race-day ready every day.

Screenshots

Kairos4 screens
RoxSIM4 screens

Verdict

The call

The clearest difference is update cadence: Kairos at every 3 days against RoxSIM's weekly. RoxSIM's advantage is 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kairos sells 3 in-app purchases, starting at $4.99 per month and RoxSIM sells 5 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Kairos ships an update every 3 days, RoxSIM weekly. The most recent releases landed on August 20, 2026 and September 19, 2026 respectively.

Scorecard2 real differences · 4 level
Kairos versus RoxSIM: the parameters behind the verdict, then further details
ParameterKairosRoxSIM
PriceFreeFree
Update frequencyEvery 3 days — betterWeekly
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.0 — better
Further details — not scored
Size74 MB45 MB
Age rating4+4+
DeveloperHonestyVisionfrank vitetta

In-app purchases

3 purchases

Kairos

Subscriptions2
  • Pro subscription monthly1 Month trial$4.991 Month
  • Pro subscription annually1 Month trial$24.991 Year
One-time1
  • Lifetime Pro subscription$19.99
5 purchases

RoxSIM

Subscriptions3
  • Monthly Subscription$4.991 Year
  • UK$4.991 Month
  • Pro Access$49.991 Year
One-time2
  • Frank the Tank Unlock$4.99
  • Hyrox Pack Unlock$7.99

Questions

Is Kairos free?
Kairos is free to download, with in-app purchases available.
Is RoxSIM free?
RoxSIM is free to download, with in-app purchases available.
Do Kairos or RoxSIM have ads?
Neither Kairos nor RoxSIM shows ads.
Which is updated more often, Kairos or RoxSIM?
Kairos ships an update every 3 days, and RoxSIM weekly. Most recently, Kairos was updated on August 20, 2026 and RoxSIM on September 19, 2026.

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