One account on Android, iPhone, and desktop
Open Weight Forecast in any modern browser. Install it from the browser menu as a Progressive Web App (display: standalone in our manifest) so it behaves like an app on your home screen.
Is Happy Scale available on Android or the web?
As of October 2, 2026, the US App Store listing shows Happy Scale for iPhone and iPad (iOS 16+) and Mac with Apple silicon. happyscale.com links to the App Store only; we found no official Google Play listing.
Be cautious with unofficial "Happy Scale APK" or "for PC" download sites — they are not listed by the developer.
What Happy Scale does well
- Four documented smoothing methods (exponential, 7-day moving average, double exponential, and "Happy Scale Smoothing" on its support pages).
- Weight predictions and milestone goals (per App Store description).
- Apple Health import/export so smart scales that write to Health can feed it.
- Active maintenance — version 2026.7 listed September 2026 on the US App Store as of October 2, 2026.
- Strong App Store reputation — about 4.9 stars from roughly 58K US ratings as of October 2, 2026 (ratings change over time).
Weight Forecast vs Happy Scale at a glance
Feature
Weight Forecast
Happy Scale
Platforms
Happy Scale: US App Store listing, checked October 2, 2026
Web (installable on Android, iPhone, desktop)
iPhone, iPad, Apple-silicon Mac (iOS 16+)
Install method
Browser + optional PWA install
App Store (no official Android or web version found)
Price model
Happy Scale IAP prices vary by region; US listing checked October 2, 2026
Free (price $0)
Free download; optional paid upgrades (IAP)
Account needed
Yes (Google or email sign-in)
Not verified from public docs
Trend smoothing
Weight trend from regression on recent weigh-ins
Four smoothing modes (per developer support pages)
Goal-date / prediction
Approximate goal date from weigh-ins (linear regression, last 30 days)
Predictions of future weight / time to a weight (per App Store description)
Milestone goals
Apple Health / Health Connect
Apple Health import/export (per App Store listing)
Garmin Connect
Weight Forecast: privacy policy & terms
Strava
Workout import; privacy policy
Food / calorie logging
AI-assistant (MCP) access
Log weight & read forecast via MCP
Offline use
Weight Forecast: PWA per terms & privacy policy
Native app (offline on device)
Import from the other app
Not available
—
Languages
English; Russian voice logging on site
English + 9 others (App Store listing)
Where Weight Forecast is different
Approximate goal date from your weigh-ins
A straight trend line through your last 30 calendar days of weigh-ins produces an approximate goal date and a weekly rate in kg/week. Method documented on our forecast page.
Garmin and Strava in the same place
Optional Garmin Connect and Strava connections are described in our privacy policy and terms. Workouts and activity data feed your daily balance; the goal-date line itself uses weigh-ins only.
Food logging and AI-assistant access
Voice and photo meal logging on the site. An MCP server lets supported AI assistants log weight and read your forecast (see llms.txt on this site).
Where Happy Scale is the better pick
You are on iPhone and Happy Scale already fits
Happy Scale is mature, polished, and actively maintained (version 2026.7 on the US App Store as of October 2, 2026).
You want several smoothing methods
Happy Scale documents four smoothing modes on its support pages — more choice than our single regression trend.
You rely on Apple Health or a scale that syncs through it
Happy Scale supports Apple Health import/export per its App Store listing. Weight Forecast does not support Apple Health or Health Connect today.
You want passcode lock or multiple profiles
Happy Scale lists passcode protection and multiple user profiles in its store description. Weight Forecast does not offer those today.
Other Android options people recommend
- Libra — often cited on Reddit for Android; trend smoothing, ads with optional paid ad removal (Google Play listing updated September 15, 2025 when we checked).
- openScale — open-source Android tracker with Bluetooth scales and CSV export on F-Droid; no account required.
Switching from Happy Scale
There is no import from Happy Scale today — you would start a fresh log. Keep weighing at the same time of day, set your goal in Weight Forecast, and allow one to two weeks of entries before the trend line stabilizes (at least 3 weigh-ins in the last 30 days for a data-based date).
FAQ
Is Happy Scale available for Android?▼
Not that we could find. As of October 2, 2026, Happy Scale is listed for iPhone, iPad, and Apple-silicon Macs on the US App Store, and we found no official Google Play listing.
Is there a Happy Scale web or Windows version?▼
We could not find an official web or Windows version. Sites offering "Happy Scale for PC" downloads do not appear to be from the developer.
What is the best Happy Scale alternative on Android?▼
Many people recommend Libra on Android. If you also want the same tracker in a browser on any device, Garmin/Strava connections, and an approximate goal date from your weigh-ins, Weight Forecast is a free web option.
Is Weight Forecast free?▼
Yes. Weight Forecast is free (price $0). No subscription or credit card is required to sign in.
Does Weight Forecast predict my goal date like Happy Scale?▼
Both show predictions from your weigh-ins. Weight Forecast fits a trend line through your recent weigh-ins (last 30 calendar days, at least 3 points) and shows an approximate date it reaches your goal. See how it works on our methodology page.
Can I import my Happy Scale data?▼
Not yet. You would start a new log in Weight Forecast; your Happy Scale history stays in Happy Scale.
Does Weight Forecast sync with Apple Health or Health Connect?▼
No, not currently. It connects with Garmin and Strava.
Does it work with smart scales?▼
You can log manually. Weight may import via Garmin Connect if your scale uploads there and you grant permission (see our privacy policy).
Can I use both apps?▼
Yes. Some people keep Happy Scale on iPhone and use Weight Forecast for Garmin/Strava data and food logging. Weights do not sync between them automatically.
Free · no credit card
Try Weight Forecast in your browser
Sign in with Google or email. Same account on phone and desktop.
Sources checked October 2, 2026: Happy Scale (App Store), happyscale.com, Libra (Google Play), openScale (F-Droid). Happy Scale is a trademark of its owner.