Number Puzzles: Sumbriska
Calm Island Bridge Sums
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Flip bridges, balance every island sum and grow your own harbor. Calm, clever boards that work fully offline, with no ads and no accounts.
A quiet, clever number puzzle where every bridge you flip brings an island closer to its perfect sum.
In Sumbriska, each island shows a target number. Flip bridges to send numbers between islands until every sum lands exactly where it should. The rules take a minute to learn, and the boards reward careful, unhurried thinking.
BUILD YOUR HARBOR
Every board you solve helps build your own island harbor. Travel through six themed regions, from Lantern Harbor and Orchard Isles to Canal Quarter, Tidal Marsh, Lantern Reef and Twin Beacons. Each one changes your island as you clear it.
TWO TIDES BOARDS
Some boards ask for more. A single bridge layout must solve two different tide schedules at once, turning one puzzle into two that have to agree.
WAYS TO PLAY
Start each day with the Daily board. Settle into The Deep, an endless dive through boards, or test your pace in Harbor Run, a timed challenge. Shipyard and Observatory side boards offer fresh twists, and the Living Blueprints workshop lets you make custom boards of your own.
HELP WITHOUT PENALTY
Hints, Undo and step explanations are always there when you want them, and they never cost XP. Learn the logic at your own speed.
COLLECT AND PROGRESS
Earn XP levels, complete Tide Orders and gather cosmetics and decorations to make your harbor feel like home.
MADE FOR FAMILIES
Child profiles have no purchases and no links. The adult area is protected by a PIN or Face ID. There are no ads, no accounts, and Sumbriska works fully offline. No data is collected.
FREE TO PLAY
The free download includes regions 1 and 2, the Daily board, The Deep and Harbor Run.
VOYAGE PASS (OPTIONAL)
The Voyage Pass unlocks regions 3 to 6, all side boards, Gale Run, the 3-4 ring workshop and premium cosmetics. It is available as an auto-renewing subscription at $4.99 per month or $29.99 per year. There is no free trial.
Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your App Store account settings at any time after purchase. Prices may vary by region.
Flip your first bridge and start building your harbor today.
Terms of Use: https://number-puzzles-sumbriska.rork.app/terms
Privacy Policy: https://number-puzzles-sumbriska.rork.app/privacy
Ratings & Reviews
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The developer, James Gray, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- James Gray
- Size
- 4.9 MB
- Category
- Puzzle
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- This app is rated 4+ with content restrictions.
Some content may be rated higher, and may therefore be restricted and managed by the developer through in-app controls. - In-App Controls
Parental Controls
- In-App Purchases
Yes
- Voyage Pass Monthly $4.99
- Voyage Pass Yearly $29.99
- Copyright
- © 2026 James Gray