Sum 2.0
How fast can you add?
Sum 2.0 launched on March 20, 2019 with 73 votes, #630 of 2,994 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
What it does
Hey guys, I am so proud to share Sum with all of you today. Currently with 20,000+ downloads, it's really a simple idea converted to one really addictive & challenging game! How fast can you add two numbers? Really looking forward to all your feedback! :)
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