Comparison

Strengthiness Interval Timer vs Sync Spin

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

Head to head
About

Strengthiness Interval Timer

This interval timer offers a straightforward and efficient way to manage your workouts. It supports multiple named sets, unlimited intervals, and provides audio and vibration cues. Ideal for various interval training protocols, it simplifies setup and tracking.

Highlights
  • Super easy setup
  • Multiple named sets
  • Unlimited intervals
  • Countdown and count-up timers
  • Beep and vibration alerts
  • Stopwatch with lap counter
  • Set counter
Features
Read full description

Strengthiness Interval Timer is the easiest to use interval timer on the App Store. • Super easy setup • Multiple named sets • Unlimited intervals • Count rounds down to 0 or up until you decide to stop • Countdown timer gives you up to 10 seconds to prepare • Beeps and vibrates (on devices that support vibration) • Stopwatch accurate to hundredths of a second • Handy set counter for when you're not doing timed efforts You don't need fancy graphics. What you need is a simple timer that just works. Strengthiness Interval Timer is that timer; a simple app that does what it needs to and is easy to use. Strengthiness Interval Timer is perfect for all sorts of timed High Intensity Interval Training, whether it's the Tabata protocol, a CrossFit WOD, Sprint 8, Viking Warrior Conditioning, or any other type of interval training you may be doing. It comes with four built in examples and you can add as many different set lists as you want. A countdown timer gives you time to setup if you're working out alone. Loud beeps make it easy to use in a group setting, and different beep patterns differentiate the countdown, interval completion, and when the timer is finished. There's no fiddling with awkward time pickers or complicated setup screens, just type in the times you want. Ever forget that 180 seconds is 3 minutes? Stop converting in your head. Just enter the number of seconds you need and Strengthiness Interval Timer will do the math for you. Forgot your GymBoss® Timer? Strengthiness Interval Timer is the perfect stand in. Strengthiness Interval Timer includes a stopwatch function with an unlimited lap counter. Perfect for coaches or training partners working together. Doing sets that aren't timed? It can be easy to forget how many sets you've done while you're recovering, especially if you're counting breaths for breathing sets. Don't worry, the Set Counter has you covered. Just a single tap and Strengthiness Interval Timer will remember for you. Download it today and enjoy the simplicity and utility that is Strengthiness Interval Timer!

About

Sync Spin

This app enhances indoor cycling workouts by connecting to Echelon smart bikes. It provides real-time metrics, detailed summaries, and historical insights to help users track progress and achieve fitness goals.

Highlights
  • Real-time metrics tracking
  • Detailed workout summaries
  • HealthKit integration
  • Interactive charts
  • Historical insights
  • Customizable dashboard
Features
Read full description

Take your indoor cycling experience to the next level with Sync Spin, the powerful workout companion designed specifically for Bluetooth-connected Echelon smart indoor cycles. Whether you’re training for performance or riding for fun, Sync Spin tracks your progress, visualizes your data, and helps you achieve your fitness goals. Key Features: • Real-Time Metrics Tracking: Monitor Cadence, Speed, Power, Resistance, Distance and more, live during your workout. Enjoy a seamless connection with your Echelon smart bike via Bluetooth. • Detailed Workout Summaries: View Average Metrics for Speed, Cadence, Power, and Resistance. See your Maximum Metrics achieved during your ride. Track total Distance and Elapsed Time. • HealthKit Integration: Sync your workouts with Apple Health to track your Heart Rate, Calories Burned, and Workout Effort Score alongside your cycling data. • Interactive Charts: Visualize your workout with beautiful, interactive line and step charts. Toggle visibility for metrics you care about: Speed, Cadence, Power, and Resistance. • Historical Insights: Browse past workouts grouped by month. Easily compare sessions and track progress over time. • Customizable Dashboard: Reorder your key metrics display to prioritize the stats that matter most to you. • Intelligent Aggregation: Data points are dynamically aggregated to ensure smooth chart performance, even during long workouts. • Insights Tab: Gain deeper performance insights with a dedicated view of your top workouts across key metrics like Speed, Cadence, Power, and Resistance. Analyze total stats, averages, and workout distribution over time, track your long-term progress with interactive graphs showcasing trends and historical comparisons, and stay motivated with streak tracking to keep your momentum going. • Quick Access & Shortcuts: Stay connected to your workouts with Home Screen Widgets, Control Center integration, and Shortcuts support, making it easier than ever to start a ride, track progress, and access key stats with just a tap. Important Note: This application is designed to be used with an Echelon Bluetooth-connected smart indoor cycle. Please note that not all bike models have been tested for compatibility. Download Sync Spin today and start riding smarter, stronger, and more efficiently! Privacy Policy & Terms: https://www.rspoon3.com/sync-spin/privacy

Screenshots

Strengthiness Interval Timer4 screens
Sync Spin4 screens

Verdict

The call

The clearest difference is price: Sync Spin at Free against Strengthiness Interval Timer's $0.99. Sync Spin also leads on update cadence (monthly vs every 5 months) and ratings volume (10 vs 1). Strengthiness Interval Timer's advantage is chart position (#187 vs unranked) and iOS requirement (13 vs 17.0). On rating, review sentiment, ads and in-app purchases 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

Sync Spin is free to download; Strengthiness Interval Timer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Strengthiness Interval Timer against 5.0 for Sync Spin. That said, the two scores are not equally well evidenced: Sync Spin has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Strengthiness Interval Timer ships an update every 5 months, Sync Spin monthly. The most recent releases landed on October 23, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 5 level
Strengthiness Interval Timer versus Sync Spin: the parameters behind the verdict, then further details
ParameterStrengthiness Interval TimerSync Spin
Price$0.99Free — better
Rating5.0 (1 ratings)5.0 (10 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings110 — better
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#187 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS13 — better17.0
Further details — not scored
Size1 MB27 MB
Age rating4+4+
DeveloperStrengthiness, LLCRichard Witherspoon

Customer experience

Strengthiness Interval Timer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Sync Spin

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Strengthiness Interval Timer

No in-app purchases

None

Sync Spin

No in-app purchases

Questions

Is Strengthiness Interval Timer free?
Strengthiness Interval Timer costs $0.99, with no in-app purchases.
Is Sync Spin free?
Sync Spin is free to download, with no in-app purchases.
Which has better reviews, Strengthiness Interval Timer or Sync Spin?
Strengthiness Interval Timer and Sync Spin are both rated 5.0 out of 5 on the App Store, from 1 and 10 ratings respectively.
Do Strengthiness Interval Timer or Sync Spin have ads?
Neither Strengthiness Interval Timer nor Sync Spin shows ads.
Which is updated more often, Strengthiness Interval Timer or Sync Spin?
Strengthiness Interval Timer ships an update every 5 months, and Sync Spin monthly. Most recently, Strengthiness Interval Timer was updated on October 23, 2026 and Sync Spin on October 30, 2026.

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