Comparison

Sol vs Astrospheric

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

Head to head
About

Sol

Forecast sunrise, sunset, and twilight times for any location and date. Set smart alarms that adjust with the seasons and receive detailed solar almanac information. Plan your day around natural light, perfect for photography, outdoor activities, or maintaining sleep cycles.

Highlights
  • Sunrise and sunset time forecasting
  • Twilight period calculation (astronomical, nautical, civil)
  • Location-aware alarms that adjust seasonally
  • Global location search and GPS support
  • Detailed solar almanac information
  • Golden hour and magic hour identification
Currently charting
Read full description

What time is sunset today? Or sunrise tomorrow? When is the "magic hour" next March 20 in Paris? With Sol, you can check times and get reminders of solar events, at home or while traveling! Great for everyone looking to plan activities based on sunlight. Use it to remind you to walk the dog before dark, get up with the sun, or find golden hour time for that perfect photo. Sol: Sun Clock is the Swiss-army knife of sunlight tools with a design inspired by the simplicity of the sundial. Use it to plan your day, guide natural sleep cycles, get the best light for outdoor photography, make sure animals or kids are safe inside before dark, or to map out the best times to go running or fishing. * Be in tune: Sol will tell you when the golden hour is, how much sunlight you have left in the day or what time the next sunrise occurs. * Look to the future, travel around the world: Sol lets you find sunlight information for any date, anywhere on earth. * Find solar midnight and solar noon, and all three twilight (dawn and dusk) periods: astronomical twilight, nautical twilight, and civil twilight. Keep tabs on the next solstice and equinox. * Reminders and Alarms: Use Sol as a natural alarm clock that you can set to any event (like sunset, golden hour or solar noon), and the alarm or reminder time will adjust gradually as the days change with the seasons. * Automatic Location: Sol not only calculates the amount of daylight and sunrise and sunset times, but does so for any location in the world (both Northern and Southern hemispheres) by using your device's GPS... no network connection required. * Other locations: Optionally, use the built-in map to choose any location in the world by moving the pin, or search using the name of any city. * Optional location-aware alarms. Sol knows when you change with your location; and as you travel it will adjust any alarms you set relative to sunrise and sunset times. Create alarms for multiple locations around the world. * Detailed almanac information: Useful information about the day's length, sun's azimuth and elevation, equinoxes and solstices, and a friendly glossary that explains all the terms. Note: Continued use of GPS running in the background can dramatically decrease battery life. However, GPS runs in the background ONLY if you have set location-aware alarms.

About

Astrospheric

This app offers advanced weather forecasting and astronomical data for stargazers and astrophotographers. It provides detailed hourly forecasts, cloud and sky transparency reports, and alerts for celestial events. It also includes tools for astronomical societies and offline site setup.

Highlights
  • 84-hour hourly weather forecast
  • Ensemble cloud forecast
  • Kp index for Aurora
  • ISS flyover paths
  • Integrated smoke forecast
  • Sky and ground data
  • Rise and set times
  • Solar and Lunar eclipse data
Features
Read full description

Astrospheric provides advanced weather tools for professional astronomers and astrophotographers, and supports hundreds of astronomical societies with tools that help members stay connected. Are you using what the pros use? Features • 84 hour, hour-by-hour forecast • Free notification reminders for major astronomical events • Ensemble cloud forecast lets you quickly compare the major forecast models with hourly updates (Astrospheric Pro) • Extended cloud forecast • Kp index for Aurora viewing (and alerts with Pro) • International Space Station (ISS) flyover paths and times • Astrospheric is the only astronomy service that integrates the smoke forecast into the transparency report • Sky data: cloud, sky transparency, seeing • Ground data: wind, temperature, and humidity • Precise rise and set times for both the sun and moon • Get weather alerts when conditions meeting your requirements are met (Astrospheric Pro) • Details Solar and Lunar eclipse data Astronomical Societies • Stay connected with chat, image sharing, and event planning with all of your members. • Qualifying astronomical societies can get Pro features for all of their members Site Mode • Information necessary to quickly set up your GOTO tracking mount • Available even if you don’t have a network connection Astrospheric Professional is now available to enable Weather Alerts, Ensemble cloud forecast, and more! • Astrospheric Professional is billed monthly or yearly and will auto-renew unless turned off at least 24-hours before the end of the current subscription period. The renewal cost will be the same as the initial sign-up cost of the subscription. Any changes in cost will be communicated before renewal takes place. • Payment will be charged to iTunes Account at confirmation of purchase • Subscriptions may be managed by you and auto-renewal may be turned off by going to the your Account Settings after purchase. A link to these settings is made available within Astrospheric "My Profile" for easy access. • The terms of use and privacy policy may be found at https://www.astrospheric.com/privacypolicy.php, purchasing a subscription shows agreement to these terms. PLEASE NOTE: Weather data is not available for Hawaii due to the domain area covered by the Canadian Meteorological Center. However, satellite and light pollution map layers, as well as other features will work in Hawaii. More information on Astrospherics forecast domain can be found here: https://www.astrospheric.com/dynamiccontent/datadomain.html

Screenshots

Sol4 screens
Astrospheric4 screens

Verdict

The call

The clearest difference is price: Astrospheric at Free against Sol's $4.99. Astrospheric also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (9.1 vs 18.0). Sol's advantage is in-app purchases (none vs 2). On rating, review sentiment, ratings volume and ads 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

Astrospheric is free to download; Sol costs $4.99 up front. Astrospheric sells 2 in-app purchases, starting at $2.99 per month. Sol asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Sol against 4.8 for Astrospheric. Both are backed by a comparable volume of ratings — 898 and 453 respectively. Written reviews are what separate them: 93% of Sol's written reviews are positive against 88% of Astrospheric's.

UpkeepUpdate frequency

Sol ships an update every 2 months, Astrospheric every 3 weeks. Both last shipped on October 14, 2026.

Scorecard5 real differences · 6 level
Sol versus Astrospheric: the parameters behind the verdict, then further details
ParameterSolAstrospheric
Price$4.99Free — better
Rating4.8 (898 ratings)4.8 (453 ratings)
Positive reviews93.2% of reviews — better87.7% of reviews
Number of ratings898 — better453
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
Best chart rank#87#76 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.09.1 — better
Further details — not scored
Size16 MB47 MB
Age rating4+4+
DeveloperJuggleware, LLCDaniel Fiordalis

Customer experience

Sol

All ratings898 ratings
Positive96.8%
Neutral1.7%
Negative1.6%
Written reviews221 reviews
Positive93.2%
Neutral2.3%
Negative4.5%

Astrospheric

All ratings453 ratings
Positive94.5%
Neutral1.5%
Negative4.0%
Written reviews146 reviews
Positive87.7%
Neutral4.8%
Negative7.5%

User reviews

Sol

From 898 App Store ratings

What we love

  • 👍 Simple and intuitive interface
  • 🚀 Accurate and reliable information
  • 💡 Useful for photographers, hikers, and outdoor enthusiasts
  • 🌅 Helps users stay in tune with natural light cycles
  • ⏰ Customizable alarms and alerts

Room to improve

  • 🐛 Occasional crashes or bugs
  • 🔋 Alarms don't work when device is muted
  • 🌙 Lack of moon phase information

Astrospheric

From 453 App Store ratings

What we love

  • 🚀 Precision tool for astrophotography
  • 🔍 Detailed weather forecasts
  • ⭐ Accurate and reliable
  • 💻 Comprehensive data and features
  • 📊 Helpful for planning observing sessions

Room to improve

  • 🐛 Occasional inaccurate forecasts
  • 🔍 Missing some weather data (e.g. wind)
  • 💰 Subscription required for full functionality
  • 🔌 Compatibility issues on some devices

Bugs and requests

Sol

Reported bugs

2 issues
  • Date selection issue where it shows a month ahead
  • Notifications stop working after a few days

Requested features

4 requests
  • Add moon phase information
  • Allow alarms to work even when device is muted
  • Expand alert options beyond sunrise/sunset (e.g. solar noon, golden hour)
  • Provide more customization options for alerts and alarms

Astrospheric

Reported bugs

2 issues
  • App crashing or not loading on some devices
  • Inconsistent temperature and wind data

Requested features

4 requests
  • Notification system for clear skies
  • Widgets for quick access to data
  • More detailed transparency and seeing data
  • Ability to flip east and west in the app

In-app purchases

None

Sol

No in-app purchases

2 purchases

Astrospheric

Subscriptions2
  • Astrospheric Pro Subscription7 Days trial$2.991 Month
  • Astrospheric Pro Subscription7 Days trial$29.991 Year

Questions

Is Sol free?
Sol costs $4.99, with no in-app purchases.
Is Astrospheric free?
Astrospheric is free to download, with in-app purchases available.
Which has better reviews, Sol or Astrospheric?
Sol and Astrospheric are both rated 4.8 out of 5 on the App Store, from 898 and 453 ratings respectively.
Do Sol or Astrospheric have ads?
Neither Sol nor Astrospheric shows ads.
Which is updated more often, Sol or Astrospheric?
Sol ships an update every 2 months, and Astrospheric every 3 weeks. Most recently, Sol was updated on October 14, 2026 and Astrospheric on October 14, 2026.
Which is more popular, Sol or Astrospheric?
Sol currently peaks at #87 in the App Store charts, and Astrospheric at #76. Chart position reflects recent download velocity rather than total install base.

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