Comparison

TimerNinja vs FuelSync (FS)

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

Head to head
About

TimerNinja

Track time for workouts and productivity with versatile timer options. Supports Apple Watch integration, Apple Health recording, and SharePlay for synchronized challenges with friends. Offers customizable themes and multiple timer types.

Highlights
  • Multiple timer types (Stopwatch, Countdown, Intervals, EMOM, Pomodoro)
  • Apple Watch standalone app and remote control
  • Record workouts to Apple Health
  • SharePlay for synchronized workouts with friends
  • Customizable dark and light themes
  • Standalone Apple Watch app
Features
Read full description

TimerNinja is the simple, flexible interval timer for workouts, training sessions, and any other timed activity — on iPhone, iPad, Apple Watch, Apple TV, Mac, and Apple Vision Pro. Start from a library of ready-made workouts — Tabata, EMOM, AMRAP, boxing and MMA rounds, running intervals, and more — or build your own in seconds. TIMERS FOR EVERY ACTIVITY • Stopwatch — count up, with an optional time cap • Timer — a simple countdown • Intervals — work/rest rounds • Multi-interval — chain interval groups together • EMOM — Every Minute On the Minute • Tabata — 20 seconds on, 10 seconds off • Pomodoro — focus and break cycles (Plus) • Custom — build anything with nested, repeating intervals (Plus) READY-MADE WORKOUTS • 31 presets across CrossFit, HIIT, combat sports, running, and focus • Benchmark WODs like Cindy, Chelsea, and Fight Gone Bad; Tabata and the 7-minute workout; boxing, MMA, and BJJ rounds; Norwegian 4x4 intervals; and box breathing • Start one right away, or save it and make it your own YOUR TIMER, EVERYWHERE • Live Activities keep your timer on the Lock Screen and in the Dynamic Island • Start your favorite timers from Home Screen and Lock Screen widgets • Control Center controls let you start, pause, and resume without opening the app • Siri & Shortcuts: start any saved timer or preset by voice, automate your routine, or put it on the Action Button on Apple Watch Ultra • Your saved timers show up in Spotlight search BUILT FOR APPLE WATCH • Run timers standalone on your watch, or use it as a remote control for the timer on your iPhone • Record workouts to Apple Health with heart rate and calories — just pick an activity type when you start • Follow your live heart-rate zone during a workout and see your time in each zone afterward (watchOS 27) • Watch-face complications and Smart Stack support put your timers one tap away ALWAYS IN SYNC • Saved timers sync automatically across your devices with iCloud • SharePlay keeps timers perfectly in sync with friends anywhere in the world — challenge them to a workout • Share any timer as a link; anyone can open it instantly, even without the app SOUNDS THAT CUT THROUGH • Clear countdown beeps, interval cues, and finish sounds • Spoken announcements that call out each interval by name (Plus) • Extra sound packs — Airhorn, Ruan, Taiko, Boxing Bell, and more (Plus) MADE TO BE GLANCED AT • A distraction-free full-screen timer you can read from across the gym • Beautiful light and dark themes for both the app and the timer screen • Localized into 11 languages TimerNinja is free to use. TimerNinja Plus unlocks the Pomodoro and Custom timer types, spoken announcements, and extra sound packs. New subscribers can try it free for 7 days. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.timerninja.com/privacy

About

FuelSync (FS)

Features
Read full description

FuelSync connects your nutrition with your health metrics to reveal powerful insights about how food affects your body. TRACK YOUR MEALS Log meals from a comprehensive catalog of foods. Track calories, protein, carbs, and fat with each meal. See your daily nutrition totals at a glance. CONNECT WITH APPLE HEALTH FuelSync seamlessly integrates with Apple Health to read your sleep, heart rate, HRV, steps, and weight data. Your meal nutrition is automatically synced back to Health, keeping all your wellness data in one place. DISCOVER HEALTH INSIGHTS See correlations between what you eat and how your body responds. Discover patterns like: - How protein intake affects your sleep quality - The relationship between carbs and your energy levels - How your eating habits correlate with heart rate variability PRIVACY FIRST Your data stays on your device. FuelSync doesn't use cloud storage, doesn't collect analytics, and never shares your information with third parties. Your health data belongs to you. KEY FEATURES - Meal logging with 170+ foods - Calorie, protein, carb, and fat tracking - Apple Health integration (read and write) - Sleep, HRV, heart rate, steps, and weight dashboard - AI-powered health insights and correlations - Daily and historical nutrition views - Beautiful, intuitive interface - 100% offline - no account required REQUIREMENTS - iOS 17.0 or later - Apple Health app (for health data integration) FuelSync is designed for anyone who wants to understand how their diet impacts their overall health and wellness. FuelSync is designed for informational purposes only and is not intended to provide medical advice, diagnosis, or treatment. The insights and correlations presented are observational and should not replace professional medical guidance. Always consult your doctor or a qualified healthcare provider before making any changes to your diet, exercise routine, or health regimen. Do not disregard professional medical advice or delay seeking it based on information from this app.

Screenshots

TimerNinja4 screens
FuelSync (FS)4 screens

Verdict

The call

The clearest difference is in-app purchases: FuelSync (FS) at none against TimerNinja's 4. FuelSync (FS) also leads on update cadence (every 2 days vs every 3 weeks) and iOS requirement (17.0 vs 26.0). TimerNinja's advantage is device support (6 vs 2). On price and ads 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. TimerNinja sells 4 in-app purchases, starting at $2.99 per month. FuelSync (FS) asks for nothing beyond the download.

UpkeepUpdate frequency

TimerNinja ships an update every 3 weeks, FuelSync (FS) every 2 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
TimerNinja versus FuelSync (FS): the parameters behind the verdict, then further details
ParameterTimerNinjaFuelSync (FS)
PriceFreeFree
Rating4.4 (9 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — betteriPhone, iPad
Requires iOS26.017.0 — better
Further details — not scored
Size16 MB9 MB
Age rating4+4+
DeveloperHeftii, Inc.Indie Studio

In-app purchases

4 purchases

TimerNinja

Subscriptions4
  • TimerNinja+ Monthly7 Days trial$2.991 Month
  • TimerNinja+ Family Monthly7 Days trial$3.991 Month
  • TimerNinja+ Yearly7 Days trial$9.991 Year
Show 1 more
  • TimerNinja+ Family Yearly7 Days trial$14.991 Year
None

FuelSync (FS)

No in-app purchases

Questions

Is TimerNinja free?
TimerNinja is free to download, with in-app purchases available.
Is FuelSync (FS) free?
FuelSync (FS) is free to download, with no in-app purchases.
Do TimerNinja or FuelSync (FS) have ads?
Neither TimerNinja nor FuelSync (FS) shows ads.
Which is updated more often, TimerNinja or FuelSync (FS)?
TimerNinja ships an update every 3 weeks, and FuelSync (FS) every 2 days. Most recently, TimerNinja was updated on October 24, 2026 and FuelSync (FS) on October 12, 2026.

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