Comparison

iWeather++ vs Synoptic Weather

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

Head to head
About

iWeather++

Features
Read full description

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.

About

Synoptic Weather

Features
Read full description

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

iWeather++4 screens
Synoptic Weather4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 4 level
iWeather++ versus Synoptic Weather: the parameters behind the verdict, then further details
ParameteriWeather++Synoptic Weather
PriceFreeFree
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.1 — better17.0
Further details — not scored
Size33 MB3 MB
Age rating4+4+
DeveloperSihyeon JangSharon Shalem

In-app purchases

None

iWeather++

No in-app purchases

None

Synoptic Weather

No in-app purchases

Questions

Is iWeather++ free?
iWeather++ is free to download, with no in-app purchases.
Is Synoptic Weather free?
Synoptic Weather is free to download, with no in-app purchases.
Do iWeather++ or Synoptic Weather have ads?
Neither iWeather++ nor Synoptic Weather shows ads.
Which is updated more often, iWeather++ or Synoptic Weather?
iWeather++ ships an update every 3 weeks, and Synoptic Weather every 5 days. Most recently, iWeather++ was updated on October 14, 2026 and Synoptic Weather on October 15, 2026.

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