Comparison

Mountain vs What The Sun?

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

Head to head
About

Mountain

Provides detailed weather forecasts for over 11,000 mountain summits globally. Offers hourly and long-range predictions, multi-elevation weather data, and offline map access for planning outdoor adventures.

Highlights
  • Free 6-day forecasts
  • Weather at multiple elevations
  • Hour-by-hour weather detail
  • Offline maps and forecasts
  • Detailed topographic and satellite mapping
  • Import GPX routes
Features
Read full description

For over 20 years, Mountain-Forecast.com has been the go-to weather service for mountain enthusiasts, offering reliable forecasts for more than 11,000 summits worldwide.
 From Mount Rainier to Mount Fuji, climbers, skiers, snowboarders, mountain bikers, and hikers count on our accurate mountain forecasts to plan everything from casual day trips to major expeditions. Why choose the Mountain Forecast App? - Weather at multiple elevations - Long-range 16-day forecasts* - Hour-by-hour weather detail - Four forecast updates per day - Detailed topographic and satellite mapping - NEW: offline maps and forecasts* - Import GPX routes *MountainPro features, available to subscribers (who also offer ad-free web browsing of the mountain-forecast.com website) Offline Access: Download forecasts and topographic maps without an internet connection so you’re always prepared. “A must-have app for anyone who spends time in the mountains. The forecasts for different elevations are critical for both planning and when I’m out climbing. The best mountain weather app out there!” Leigh Strong (USA) Please remember that mountain weather is unpredictable; always combine our forecasts with your on-the-spot observations and other sources. Venture safely with Mountain-Forecast.com as your essential mountain weather guide. -- Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

What The Sun?

Read full description

What The Sun? is a beautiful sun and daylight app that helps you understand where the sun is, how strong it feels and what that means in plain English. See where the sun is in the sky, which direction it is coming from, when it rises, when it sets, how much daylight is left and how strong the sunlight is. Instead of staring at confusing angles and solar numbers, What The Sun? gives you a live sun compass, map view and human-readable explanations with a bit of personality. Set any location using map search, check your current location, browse the sun’s path across the sky or save places you care about. Whether you are checking the sun at home, planning time outside, avoiding glare, finding shade, What The Sun makes sunlight easier to understand. What The Sun is great for: * Walkers and runners * Cyclists * Photographers and filmmakers * Gardeners * Campers and hikers * Solar panel users * Outdoor workers * Weather hobbyists * Parents planning time outside Live Sun Compass The main compass shows the sun’s position in a way that makes sense in the real world. See where the sun is, how that relates to the direction you are facing and whether the sunlight is ahead, behind, to your left or to your right. At a glance, you can see: * Sun direction * 3D Sun and Shadow Map * Elevation * Sunrise time * Sunset time * Solar noon * Daylight duration * UV index * Irradiance * Temperature * Feels-like temperature * Weather source Sunlight With Personality Choose how the app talks to you with selectable Sun Voice styles. Keep it simple and practical, make it fun, go nerdy with bearings and solar details or turn on rude commentary if you want the sun to have attitude. Weather does not have to be boring. Sun Path Follow the sun’s path across the sky. See sunrise, sunset, solar noon, daylight length and how the sun changes position throughout the day. Sun Map Explore sunlight around any location using the built-in map. View the sun’s direction, path, rays, time of day and seasonal movement over a real map. Locations Search for towns, cities and places using Apple Maps, then check the sun position and daylight details for that location.

Screenshots

Mountain4 screens
What The Sun?4 screens

Verdict

The call

The clearest difference is price: Mountain at Free against What The Sun?'s $0.99. Mountain also leads on chart position (#69 vs unranked) and iOS requirement (15.1 vs 18.6). What The Sun?'s advantage is in-app purchases (none vs 2) and ads (none vs shown). On 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

Mountain is free to download; What The Sun? costs $0.99 up front. Mountain sells 2 in-app purchases, starting at $3.99 per month. What The Sun? asks for nothing beyond the download.

UpkeepUpdate frequency

Mountain ships an update every 2 months, What The Sun? every 3 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard6 real differences · 5 level
Mountain versus What The Sun?: the parameters behind the verdict, then further details
ParameterMountainWhat The Sun?
PriceFree — better$0.99
Rating4.9 (831 ratings) — better—
Positive reviews73.8% of reviews—
Number of ratings831 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#69 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.6
Further details — not scored
Size128 MB40 MB
Age rating4+9+
DeveloperMeteo365 Ltd.Mark David

Bugs and requests

Mountain

Reported bugs

7 issues
  • App crashes after 4 seconds of use
  • Forecast table data misalignment (temperature shows with wrong icons)
  • Password reset not accepting new passwords
  • Freezing level data appears in humidity column
  • 12-day forecast non-functional at mid-low elevations
Show 2 more
  • Minimum temperature missing from recent update
  • Graph data not lining up with forecast information

Requested features

6 requests
  • Imperial and metric unit switching
  • GPS track recording capability
  • Past weather data/history viewing
  • Better search functionality for minor peaks and ridges
  • Restore minimum temperature display
Show 1 more
  • 12-day forecast for all elevation settings

What The Sun?

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Mountain

Subscriptions2
  • Premium Service (Monthly)$3.991 Month
  • Premium Service (Yearly)$24.991 Year
None

What The Sun?

No in-app purchases

Questions

Is Mountain free?
Mountain is free to download, with in-app purchases available.
Is What The Sun? free?
What The Sun? costs $0.99, with no in-app purchases.
Do Mountain or What The Sun? have ads?
Mountain shows ads; What The Sun? does not.
Which is updated more often, Mountain or What The Sun??
Mountain ships an update every 2 months, and What The Sun? every 3 days. Most recently, Mountain was updated on October 27, 2026 and What The Sun? on October 28, 2026.

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