Сяй: Ukraine Power Outages
Blackout schedule by address
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Lights on: see how long they'll last. Lights out: see when they're back. Your queue by address in a minute, reminders even offline. Today's schedule is free.
Сяй (Ukrainian for “Shine!”) shows the power-outage schedule for your address in Ukraine. Green: the power is on and you see how long it will last. Amber: when it's back. It reminds you in advance — even offline — shows whether neighbours in your queue already have power, and finds venues with power nearby.
FIND YOUR QUEUE BY ADDRESS
Tap "Locate me" and the app finds your region, town and street — just add the house number. Or type the address: we ask the grid operator for your queue. Address search works in Kyiv, the Dnipropetrovsk region and 13 more regions; elsewhere, pick your queue number from the list and the app tells you where to find it. When operators reassign queues (1 October and 1 April), Сяй re-checks the queue of your saved address.
FREE FOR EVERYONE, FOREVER
• Today's schedule for your place: "Power on · steady since 08:24" and the countdown to the next outage
• The day as one bar — green on, amber off, grey possible changes
• A reminder 30 minutes before an outage — scheduled on the phone, works offline
• Notices when today's schedule changes; emergency outages and Ukrenergo notices
• Outage mode: time left, phone battery, internet, neighbours' reports and "Find power nearby"
• "Power on / off" reports from neighbours in your queue
• Map of venues with power — cafés, coworkings and shops with internet and opening hours; directions in Google Maps
• A schedule picture with a QR code for your building's chat
• Quiet hours 23:00–07:00
СЯЙ PRO — $0.99 / MONTH
• Tomorrow's schedule — in the app and as a notification as soon as the operator publishes it
• Home Screen and Lock Screen widgets
• Live Activity timer on the Lock Screen and in the Dynamic Island
• Your family's places — parents, the summer house, work — on your iPhone with their own reminders; they install nothing
• Custom reminder times — 5, 15 minutes, an hour, several at once
• A loud alarm before an outage that rings even in silent mode (iOS 26)
• "Will I make it?": when to start the washing machine or boiler so it finishes before the outage — with a reminder
• Calendar subscription
• Weekly and monthly statistics, typical hours and a forecast marked with its accuracy
One subscription covers the whole family via Family Sharing (up to 6 people). If the App Store offers you a free trial, the first days are free and the app reminds you before the first charge. Renews monthly until cancelled in Settings › [your name] › Subscriptions or in Profile › «Керувати підпискою».
Schedules come from the official websites and channels of regional grid operators, YASNO and Ukrenergo (DTEK schedules for the Kyiv and Odesa regions via an open dataset that copies DTEK's pages) and are checked every few minutes: Kyiv city, the Dnipropetrovsk, Kyiv and Odesa regions and 16 more regions. Not yet: Donetsk, Khmelnytskyi and Chernihiv regions; no schedules are published for Luhansk and Kherson. Сяй is not an official app of any operator; if anything differs, the operator's website is right. The app is in Ukrainian.
No sign-up, no trackers. We only count totals of screen views, not linked to you.
Terms: https://ios.service-lab.site/svitlograf/terms
Privacy: https://ios.service-lab.site/svitlograf/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• The Сяй Pro screen now appears when you open the app. You can close it right away — the close button at the top or «Продовжити безкоштовно» (Continue for free).
The developer, Denys Khomenko, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Denys Khomenko
- Size
- 11.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- Ukrainian
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Сяй Pro $0.99
- Copyright
- © 2026 Denys Khomenko
