RunGap vs Scale Relay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RunGap
Consolidate your fitness data from over 40 popular services into one app. Access your complete training history, view detailed statistics, and manage your gear usage. Easily share, backup, and export your workouts for comprehensive control over your fitness journey.
- Connects 40+ fitness services
- Consolidates training history
- View statistics and charts
- Track gear usage
- Share, backup, and export workouts
- Geotag photos and videos
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The most well-connected Workout Data manager on the App Store with support for 50 of the most popular apps and services. Get your complete training history and take control of your workout data. Keep all your workout details from popular services including Apple Watch, Polar, Garmin, Coros, Peloton, Strava, Runtastic, Suunto, adidas, SportsTracker, Apple Health, Zwift, Rouvy and many others on your iPhone or iPad for instant access anytime. Easily share, backup and export your workouts as you like (requires "Swag Bag" subscription available as in-app purchase). Unattended background operation. RunGap can both read and write workouts from and to Health including route maps, heart rate and distance. View statistics and interactive charts, maps and details for individual workouts. Browse your favorite tracks and compare past results. Easily track your shoe, bike and other gear usage. Geotag photos and videos related to an activity. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ PLEASE NOTE: If you have any issues, consider contacting support instead of giving a negative rating - most times your issues can be solved or answered. A rating will not get your app back to work, but the support can help - simply use the integrated "Online Support" function.
Scale Relay
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Get your smart scale's weigh-ins into Garmin Connect, straight from your iPhone. Two ways in, one tap out. APPLE HEALTH ROUTE: ANY SCALE If your scale's app saves weight to the Health app, Scale Relay picks it up and sends it to Garmin Connect. Works with Withings, Renpho, Eufy, Etekcity, Zepp Life, Wyze, Picooc and any other app that writes weight to Apple Health. Body fat and BMI come along when your scale's app provides them. With the Sync to Garmin action in Shortcuts, an automation can send new weigh-ins without opening the app. BLUETOOTH ROUTE: XIAOMI SCALES, NO OTHER APP NEEDED Step on a Mi Body Composition Scale 2 or a Xiaomi Body Composition Scale S400 and Scale Relay reads the measurement directly: weight, body fat, muscle mass, bone mass, water, BMI and BMR. It can also save each weigh-in to Apple Health. The S400 needs a one-time authorization with your Xiaomi account. WHAT YOU GET • A preview of every weigh-in before it is sent; nothing leaves without your tap or your Shortcut • Body composition in Garmin Connect, not just the weight • Bluetooth weigh-ins saved to Apple Health too, if you turn it on • A Sync to Garmin action for Shortcuts and automations • Weigh-ins from the last 7 days are included; Garmin Sync unlocks older history • One Garmin sign-in, two-factor authentication supported • A "Sent to Garmin" list so you know what arrived FREE TO TRY Your first two syncs are free on either route. Unlimited syncing is a single one-time purchase called Garmin Sync. No subscription. PRIVACY FIRST Your measurements stay on your iPhone and go only to your own Garmin account and, if you choose, to Apple Health. No Scale Relay account, no tracking, no ads. REQUIREMENTS • iOS 17 or later • A Garmin Connect account • Apple Health route: any scale app that writes weight to the Health app • Bluetooth route: Mi Body Composition Scale 2 or Xiaomi Body Composition Scale S400 Scale Relay is an independent app. It is not affiliated with, endorsed by or associated with Garmin, Xiaomi, Withings, Renpho, Eufy, Etekcity, Zepp, Wyze, Picooc or any other scale or fitness-platform maker. Product names are trademarks of their respective owners.
Screenshots
Verdict
The clearest difference is device support: RunGap at 3 against Scale Relay's 1. On price, update cadence, 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
Both are free to download. RunGap sells 2 in-app purchases, starting at $4.99 per 3 months and Scale Relay sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | RunGap | Scale Relay |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (5.9K ratings) — better | — |
| Positive reviews | 76.9% of reviews | — |
| Number of ratings | 5.9K — better | — |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 16 — better | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 2 MB |
| Age rating | 12+ | 4+ |
| Developer | CTRL-N | Marcin Naglik |
Bugs and requests
RunGap
Reported bugs
3 issues- App crashes or freezes
- Syncing issues with certain platforms
- Incorrect data transfer or formatting
Requested features
4 requests- Improved user interface and navigation
- Automatic background syncing
- Integration with more fitness platforms
- Offline data access and editing
Scale Relay
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RunGap
- Quarterly Swag Bag$4.993 Months
- Annual Swag Bag$14.991 Year
Scale Relay
- Garmin Sync$14.99









