Sum Thread

Name: Sum Thread
Availability: InStock
Author: Tethered Rifts

Tethered Rifts

Contains adsIn-app purchases

Everyone

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Everyone

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About this game

Trace a path through a grid of digits so the numbers under your thumb add up to the target — exactly. Hit it and the thread burns away and the target climbs, with the next three targets shown so you can plan ahead. Miss and the thread breaks and your streak resets.

• Trace a path and sum the digits under it
• Rare gold cells double, violet cells subtract
• Daily is one board for everyone that day; Blitz races a 90-second clock

Endless, plus a seeded Daily board and a 90-second Blitz sprint.

Sum Thread is part of Tethered Rifts — 14 handmade mobile games that share one account and one wallet. Play straight away as a guest; sign in later and your progress follows you.

Trace the number that adds up. Trace a path and sum the digits under it.

Updated on

Sep 29, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.

No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info, and App info and performance
Data isn’t encrypted
You can request that data be deleted