# Helios Clock > Night-friendly clock with auto-brightness and sunrise/sunset times. (iPhone/iPad app by Thierry Leveque.) - Source: https://appshunter.io/ios/app/helios-clock/id715131032 (this page in markdown: same URL + `.md`) - Developer: [Thierry Leveque](https://appshunter.io/developer/708768700) - Category: Utilities - Price: Free - Rating: 4.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 8.0 · 16 MB - Languages: American English, French (France) - Released: 2014-01-09 - Data updated: 2026-09-09 - Monetization: free ## What is Helios Clock? Finally a clock that can really be used at night without lighting the entire room! Helios Clock lowers the brightness of the screen of your iPhone at launch. Just enough to be readable in total darkness. More, Helios Clock automatically adjusts its brightness depending of it's the day or the night! If the sun is down, the brightness will be at the minimum and if it is the day, the brightness will be increased. features: - Auto adjust the brightness if it is the day or the night - Increase (or decrease) in the brightness progressively at dawn or dusk. - 24h or 12h mode - Display time of sunrise and sunset - Temporarily back to normal brightness. - Extra light with the flash of the iPhone - Automatic calculation of dusk and dawn duration - Adjustment of the brightness - Adjustment of the brightness difference between day and night How to use: - Slide your finger horizontally to adjust the brightness - Tap the icon of the sun or moon to display the sunrise and sunset time - Tap once to temporarily restore the brightness to its original value - Tap again to return to the low brightness - Double tap to turn the flash light on. Again to turn it off Weather: Helios Clock 2 can now display the external temperature at your location. You have two choices of weather service: Yahoo Weather or your own Netatmo Weather Station. To use Yahoo Weather, all you have to do is to agree to the use of the localization service (gps). The gps will only be used once per hour when the application is in used. For the Netatmo service, of course you need to own your own Netatmo Weather Station. You will also need to give your Netatmo username and password, but only once to request authorization from the Netatmo servers. Your password and username are never saved in the application preferences. * To be able to know the time of sunrise and sunset, Helios Clock needs the GPS coordinates of the iPhone. ## Key features - Automatic brightness adjustment for day/night - Progressive brightness change at dawn/dusk - Sunrise and sunset time display - Temporary brightness restoration - Flashlight control - External temperature display ## Is Helios Clock safe? Not enough ratings yet to assess Helios Clock. ## Is Helios Clock legit? Helios Clock is no longer available in the App Store. The AppsHunter Legitimacy Score for Helios Clock is 35 out of 100 points across 7 verification signals from App Store and developer data. ## Frequently asked questions about Helios Clock ### Does Helios Clock have ads? Helios Clock is free and does not contain advertisements. ### What devices does Helios Clock support? Helios Clock is available for iPhone, iPad, and iPod touch devices. ### How does Helios Clock adjust brightness automatically? Helios Clock automatically adjusts its brightness based on whether it is day or night, dimming the screen for nighttime readability and increasing it during the day. ### Can I see sunrise and sunset times with Helios Clock? Yes, Helios Clock can display the time of sunrise and sunset. It requires GPS coordinates from your iPhone to provide this information. ### How do I temporarily restore normal brightness in Helios Clock? To temporarily restore normal brightness, tap the screen once. Tap again to return to the low brightness setting. ### What is the age rating for Helios Clock? Helios Clock has an age rating of 4+, making it suitable for a wide range of users. ### How often is Helios Clock updated? The latest version of Helios Clock, 2.0.5, was last updated on January 31, 2017. Updates typically include bug fixes and feature enhancements. ### Can Helios Clock display the external temperature? Yes, Helios Clock can display the external temperature at your location using either Yahoo Weather or your Netatmo Weather Station, provided you grant location services or Netatmo login credentials. ## Version history (last 5 releases) ### 2.0.5 — 2017-01-31 With the use of the Netatmo station, the trend of the temperature now appear with it. Also some fixes for display problems. ### 2.0.4 — 2017-01-26 Bug fix for temperature display using forecast.io ### 2.0.2 — 2015-12-22 * More bug fixes! New for version 2: * Added support for outside temperature on the main screen! Two weather services are supported: Yahoo Weather and your one Netatmo Weather Station! * Automatic calculation of dusk and dawn duration * The double tap to toggle on and off the flashlight is now done with a single finger. (Not use anymore to quit the application) * New font is used * Bigger text size for display of sunrise and sunset time * Display weather details when tapping on the temperature value * Now support 3D Touch shortcuts for iPhone 6s and 6s+ * New help button ### 2.0.1 — 2015-12-16 * Bug fixes! No more crash after setting the weather service on! * Display weather details when tapping on the temperature value * Now support 3D Touch shortcuts for iPhone 6s and 6s+ * New help button New for version 2: * Added support for outside temperature on the main screen! Two weather services are supported: Yahoo Weather and your one Netatmo Weather Station! * Automatic calculation of dusk and dawn duration * The double tap to toggle on and off the flashlight is now done with a single finger. (Not use anymore to quit the application) * New font is used * Bigger text size for display of sunrise and sunset time ### 2.0 — 2015-12-09 * Added support for outside temperature on the main screen! Two weather services are supported: Yahoo Weather and your one Netatmo Weather Station! * Automatic calculation of dusk and dawn duration * The double tap to toggle on and off the flashlight is now done with a single finger. (Not use anymore to quit the application) * New font is used * Bigger text size for display of sunrise and sunset time * Complete rewrite of the settings section * Complete rewrite of the application in Swift 2 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*