Comparison

TerraWatch vs Comparecast

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

Head to head
About

TerraWatch

Features
Read full description

TerraWatch is a real-time monitoring app designed for farmers and landowners. FIELD MANAGEMENT Mark your fields on the map and view NDVI vegetation analysis via satellite imagery. Get a dedicated weather forecast for each individual field. WILDFIRE ALERTS Track high-confidence active fire detections near you using NASA FIRMS satellite data. Receive instant notifications when a new fire is detected within your chosen radius. EARTHQUAKE ALERTS Monitor real-time M4.5+ seismic activity from the USGS database. Get notified immediately when ground movement is detected near your location. WEATHER FORECAST View precipitation probability, temperature, wind speed, and ET₀ evapotranspiration data for your exact location. Irrigation need and frost risk are calculated automatically. PRO FEATURES • 14-day field weather forecast • 250 km, 500 km and 1000 km notification radius • Satellite map layer for advanced terrain view Data sources: NASA FIRMS, USGS, Open-Meteo, Sentinel Hub

About

Comparecast

This app displays forecasts from multiple independent weather models, allowing users to compare predictions and understand forecast uncertainty. It offers detailed hourly and 10-day forecasts, a live weather station map, and customizable units and locations.

Highlights
  • Seven independent forecast models side-by-side
  • Consensus card for model agreement
  • Interactive Compare chart
  • Hourly forecast details
  • 10-day forecasts with conditions
  • Live weather station map
  • Customizable units and locations
Features
Read full description

Most weather apps show you one number. Weather Source shows you what every major forecast model actually says, so you know when they agree, when they disagree, and which one to trust for your location. WHY MORE THAN ONE MODEL? Every forecast you've ever seen came from a numerical weather model. Each model is a supercomputer running its own simulation of the atmosphere, with slightly different starting data and slightly different math. GFS (USA), ECMWF (Europe), ICON (Germany), and the rest can disagree by 5° or more for the same hour at the same place. Apps that use a single source hide that uncertainty. Weather Source surfaces it. WHAT'S INSIDE • Seven independent forecast models from the world's top weather centers, side by side • A consensus card that shows, at a glance, how tightly the models agree on today's high • Interactive Compare chart that lets you drag across any future hour or day to see what every enabled model predicts for temperature, precipitation, or wind • Hourly chart you can drag horizontally to read the exact value at any future hour • Forecasts for the next 10 days with highs, lows, conditions, and rain probability • Live weather station map where you can tap any METAR station for the latest observation, with wind direction shown in compass points • Day and night backdrop that flips automatically at sunrise and sunset • Pull down anywhere to refresh MAKE IT YOURS • Choose your default forecast model per location • Toggle which models appear in Compare • Use your own units for temperature (Celsius or Fahrenheit), wind (km/h, mph, knots, or m/s), and precipitation (millimeters or inches) • Save as many locations as you want, and search any city on Earth LIVE DATA, NO ACCOUNTS Weather Source needs no account and never asks you to sign up. There are no ads, no tracking, and no analytics. Forecasts come from Open‑Meteo's free weather API. Live station observations come straight from NOAA's Aviation Weather Center. Your location data never leaves your device. WHO IT'S FOR Pilots reading aviation winds. Sailors plotting a passage. Hikers checking mountain forecasts. Photographers chasing golden hour. Growers timing irrigation. Storm chasers comparing models. Commuters who just want to know if it'll rain. Anyone tired of weather apps that pretend the forecast is a single confident number when it isn't. DATA SOURCES • Open‑Meteo (open-meteo.com) provides the forecasts from multiple weather models, plus city search • NOAA Aviation Weather Center (aviationweather.gov) provides METAR observations from thousands of stations worldwide Weather Source is for people who care which model their forecast came from.

Screenshots

TerraWatch4 screens
Comparecast4 screens

Verdict

The call

The clearest difference is in-app purchases: Comparecast at none against TerraWatch's 1. TerraWatch's advantage is update cadence (every 5 days vs every 2 weeks). On price, ads, device support and iOS requirement 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. TerraWatch sells 1 one-off in-app purchase. Comparecast asks for nothing beyond the download.

UpkeepUpdate frequency

TerraWatch ships an update every 5 days, Comparecast every 2 weeks. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 8 level
TerraWatch versus Comparecast: the parameters behind the verdict, then further details
ParameterTerraWatchComparecast
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size1 MB5 MB
Age rating4+4+
DeveloperTolga UlutasWilliam Kirkpatrick

In-app purchases

1 purchases

TerraWatch

One-time1
  • TerraWatch Pro$2.99
None

Comparecast

No in-app purchases

Questions

Is TerraWatch free?
TerraWatch is free to download, with in-app purchases available.
Is Comparecast free?
Comparecast is free to download, with no in-app purchases.
Do TerraWatch or Comparecast have ads?
Neither TerraWatch nor Comparecast shows ads.
Which is updated more often, TerraWatch or Comparecast?
TerraWatch ships an update every 5 days, and Comparecast every 2 weeks. Most recently, TerraWatch was updated on September 21, 2026 and Comparecast on September 9, 2026.

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