# Strengthiness Interval Timer vs Sync Spin

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.

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.

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.

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.

## The numbers

| Metric | Strengthiness Interval Timer | Sync Spin |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/strengthiness-interval-timer/id707524017/reviews) | [5.0 (10 ratings)](https://appshunter.io/ios/app/sync-spin/id6739968248/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Paid | **Free** |
| Best chart rank | **#187** | — |
| Size | 1 MB | 27 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Strengthiness, LLC](https://appshunter.io/developer/579445324) | [Richard Witherspoon](https://appshunter.io/developer/1690898003) |

## What reviewers say

### Strengthiness Interval Timer

[App page](https://appshunter.io/ios/app/strengthiness-interval-timer/id707524017)

**Currently charting:** #187 Top Paid · Health & Fitness (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sync Spin

[App page](https://appshunter.io/ios/app/sync-spin/id6739968248)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*