iWeather++ vs Synoptic Weather
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iWeather++
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iWeather combines forecasts from 30+ of the world's most trusted meteorological sources, including ECMWF, NOAA, Met Norway, UK Met Office, JMA, and your regional weather authority, then uses AI to deliver one hyper-accurate prediction. Near-Term Accuracy Most weather apps show you a 10-day forecast. iWeather focus on what matters: the next 5 hours with surgical precision. When you need to know if you'll make it home dry, iWeather delivers. Minute-by-Minute Precision See precipitation probability for every minute of the next hour. Know if you have 12 minutes or 47 minutes before the rain starts. Plan your day with confidence, not guesswork. Smarter Than Any Single Source Weather models disagree constantly. iWeather weighs each source by reputation, regional expertise, and real-time agreement, giving you a confidence-rated forecast that outperforms any single provider.
Synoptic Weather
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Synoptic Weather shows rain on the map and the forecast for any place in the world. • Animated rain map: six hours back and six hours ahead, with a time slider and play button. • 16-day forecast: temperature, feels-like, humidity, UV index and chance of rain. • Sea and waves: wave height, period, direction and water temperature — for surfing, swimming or fishing. • Air quality: the index, PM2.5, PM10 and dust, with a warning when dust is expected. • Tap the map or search for a city to see its forecast at once. • Opens on the forecast for where you are. • Home Screen and Lock Screen widgets for your location or a place you pick. No sign-up and no ads. Weather data from Open-Meteo; map from OpenStreetMap.
Screenshots
Verdict
The clearest difference is update cadence: Synoptic Weather at every 5 days against iWeather++'s every 3 weeks. iWeather++'s advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
iWeather++ ships an update every 3 weeks, Synoptic Weather every 5 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.
| Parameter | iWeather++ | Synoptic Weather |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 33 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Sihyeon Jang | Sharon Shalem |
In-app purchases
iWeather++
No in-app purchases
Synoptic Weather
No in-app purchases
Questions
Is iWeather++ free?
Is Synoptic Weather free?
Do iWeather++ or Synoptic Weather have ads?
Which is updated more often, iWeather++ or Synoptic Weather?
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