Comparison

Modern Interval Workout Timer vs Cycle Sync Running Coach

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

Head to head
About

Modern Interval Workout Timer

This versatile timer supports HIIT, Tabata, circuit training, and combat sports like boxing. Customize visuals, sounds, and presets for a personalized workout experience. Track and replay past sessions with a clean, ad-free interface.

Highlights
  • Interval and regular timer modes
  • Customizable themes and sounds
  • Large, bold visuals
  • Pre-made and saved presets
  • Workout log and replay
  • Ad-free experience
Features
Read full description

This workout timer is ideal for your HIIT (high intensity interval training), circuit training, Tabata routines and is compatible with many more sports. For instance it also works perfectly for training or sparring in combat sports or martial arts like boxing, kick boxing, muay thai, MMA and more as it'll keep track of your rounds. Finally, it is also great for all bodyweight exercices, at home or at the gym. The app features a simple yet powerful user interface. You can get started in a second, but if you want to go further you can really make it your own: - Regular timer, interval timer, count down... if you want to time something, the app has you covered! - Many different visual themes. You can even create your own, changing colors, fonts and more. - Personalise all sounds and warnings. - Very large and bold visuals working both in portrait and landscape mode. - Use pre-made timers (boxing rules, Tabata 20/10, HIIT 30/30 and more), or save your own presets. - Keep track of your workouts with a full log of completed trainings. You can even replay them. - Simple and clean interface that works perfectly in light or dark mode. On top of this, the app is ad-free to have a more stable and clutter-less experience.

About

Cycle Sync Running Coach

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Some weeks you feel unstoppable. Others, a 5k feels like a marathon. That's not a lack of discipline — it's your cycle, and most training plans ignore it completely. Cycle Sync builds your running week around where you actually are this month. CYCLE-AWARE TRAINING With Premium, your plan shifts with your phase. Quality sessions stay as written in the follicular and ovulatory phases. Volume over intensity through the luteal phase. Gentle, honest days when you're bleeding — never a hard session prescribed on a day your body is doing something else. Training for a 5k, 10k, half or marathon? Your week periodizes toward race day — base, build, peak, taper — and race day itself never moves. ADAPTS WHEN YOU DO Log how you feel in seconds — energy, cramps, sleep, flow. With Premium, your week adjusts around it. Missing a run or easing off isn't failure and Cycle Sync never treats it that way. No streaks to break, no guilt, no red rings shaming you. AN AI COACH THAT KNOWS YOUR WEEK Ask anything. "I have terrible cramps today." "Why is today easy?" "Can I move my long run to Sunday?" Your coach knows your phase and your plan, explains every change in one plain sentence, and can reshuffle your week on request. It tells you the real reason a day looks the way it does — not a generic tip. RUN TRACKING BUILT IN GPS route, distance, pace and cadence. Finished runs save to Apple Health alongside everything else. SAFETY THAT'S HONEST Let a trusted contact know when you head out, with a message you send yourself. A daylight cue when you're heading into dusk. No fake live-tracking promises. Free, always. SEE YOUR PATTERNS Every run is tagged with the cycle phase you were in. Once you've logged a couple of full cycles, Cycle Sync reads your own record back to you: which phases you run strongest in, how your energy and symptoms move through the month, and how many of your cycles each finding rests on. Never a study's average — your numbers. When a finding lands on a week that has a hard session in an unhelpful window, Cycle Sync offers to move it. One tap, free for everyone, and you can put it back. Monthly distance, pace and run trends. PRIVACY BY DESIGN Your cycle dates, symptom logs, routes and runs live on your iPhone and in Apple Health. There's no account — no email, no password, no profile on a server. We don't sell your data, don't run ads, and don't track you. To build your week and to answer you, Cycle Sync sends a short, anonymised summary — your phase, your plan, and how the last few weeks have trended — to an AI service. Never your name, your dates, your raw logs, or where you run. Setup shows you that summary and asks before any of it is sent; say no and your plan is built entirely on your iPhone. The privacy policy spells the rest out in full. FREE FOREVER Run tracking, period logging and safety sharing are free and always will be. CYCLE SYNC PREMIUM Unlocks the cycle-adaptive layer — every workout retuned to your phase and your logged symptoms — plus the conversational AI coach. Monthly or annual. SUBSCRIPTION DETAILS Cycle Sync Premium is an auto-renewable subscription, offered as Premium Monthly (one month) or Premium Annual (one year). The price for your region is shown in your local currency on the subscription screen before you confirm. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically for the same period unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage your subscription or turn off auto-renew in your Apple Account settings after purchase. Cycle Sync is a training app, not a medical device, and doesn't give medical advice. If something feels wrong, talk to a clinician. Privacy Policy: https://bloomcyclefitapp.github.io/bloom-privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Modern Interval Workout Timer4 screens
Cycle Sync Running Coach4 screens

Verdict

The call

Modern Interval Workout Timer and Cycle Sync Running Coach are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Modern Interval Workout Timer sells 3 in-app purchases, starting at $0.99 per month and Cycle Sync Running Coach sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Modern Interval Workout Timer ships an update every 4 days, Cycle Sync Running Coach every 5 days. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

ScorecardNo meaningful differences
Modern Interval Workout Timer versus Cycle Sync Running Coach: the parameters behind the verdict, then further details
ParameterModern Interval Workout TimerCycle Sync Running Coach
PriceFreeFree
Rating3.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone
Requires iOS18.018.0
Further details — not scored
Size9 MB6 MB
Age rating4+4+
DeveloperMarc GauthierDenis Vladimirovic Golubev

In-app purchases

3 purchases

Modern Interval Workout Timer

Subscriptions2
  • Premium (monthly subscription)$0.991 Month
  • Premium (yearly subscription)$4.991 Year
One-time1
  • Lifetime premium$14.99
2 purchases

Cycle Sync Running Coach

Subscriptions2
  • Premium Monthly7 Days trial$12.991 Month
  • Premium Annual7 Days trial$79.991 Year

Questions

Is Modern Interval Workout Timer free?
Modern Interval Workout Timer is free to download, with in-app purchases available.
Is Cycle Sync Running Coach free?
Cycle Sync Running Coach is free to download, with in-app purchases available.
Do Modern Interval Workout Timer or Cycle Sync Running Coach have ads?
Neither Modern Interval Workout Timer nor Cycle Sync Running Coach shows ads.
Which is updated more often, Modern Interval Workout Timer or Cycle Sync Running Coach?
Modern Interval Workout Timer ships an update every 4 days, and Cycle Sync Running Coach every 5 days. Most recently, Modern Interval Workout Timer was updated on October 12, 2026 and Cycle Sync Running Coach on October 14, 2026.

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