About App
"How many minutes until it gets dark?" That answer, most beautifully and intuitively.
"Sunset Hiker" is a mountaineering-specific app that accurately calculates sunset time from location and date/time, displaying it along with the current time. Since "time remaining until sunset" is visualized on the clock face, you can instantly judge when to descend and allocate your pace.
Key Features
- Design: A glass-like, transparent UI designed not to obstruct the breathtaking mountain scenery.
- Visibility: Intuitive color coding allows you to grasp the remaining time until sunset at a glance.
- Functionality: Automatically calculates accurate sunset times based on GPS location—fully functional even offline.
A Message from the Developer
Have you ever been surprised by how quickly the sun sets in the mountains?
That sudden moment of anxiety during a hike: "How many minutes until it gets dark?"
I developed this app to eliminate that worry.
I hope this app becomes a trusted partner for your safe hiking adventures.
Support Center
Please contact us here for how to use the app, bug reports, or other questions.
📋 Contact via Form
Open Form →FAQ
Q. The app does not start
A. The app version may be old. Please update to the latest version from the App Store and try again. If that doesn't solve it, please try restarting your device.
Q. Data migration when changing models?
A. Currently, there is no cloud backup function. Please wait for future updates.
Privacy Policy
This privacy policy defines the handling of user information in the smartphone app "Sunset Hiker" (hereinafter referred to as "this app") provided by Resoto Apps (hereinafter referred to as "we").
1. Collection of User Information
This app collects current location information (latitude and longitude) of the user's device in order to calculate sunset and sunrise times.
2. Purpose of Use of Location Information
The acquired location information is used only for calculation processing within this app (display of sunset time, reflection on the clock face).
3. Provision and Transmission to Third Parties
This app does not transmit or save acquired location information to the developer's server or third-party servers. Also, we do not provide it to third parties. All calculations are completed within the device.
4. Handling of Personal Information
This app does not collect personal information other than location information (name, address, email address, etc.).
5. Inquiries
For inquiries regarding this policy, please contact us via the following.
bigmakiinum@outlook.jp
Date of Enactment: December 8, 2025