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Sorobaco
No score. No levels. The Soroban observes how you think.
Sorobaco is not a math game. It is not a calculator trainer. No score, no levels, no explicit feedback. The system watches how you use the Soroban, your hesitations, errors, recovery time, rhythm and adjusts its pressure in response. Three phases gradually take you from full equation visible to pure mental operation, building toward Anzan: arithmetic without reference. The session ends when cognitive friction crosses a threshold. No announcement, no game over screen. The flow simply stops.
Hey Product Hunt!
I built Sorobaco because I kept thinking about one question: can a digital tool teach a physical discipline without ever explaining it?
The Soroban is a 17th-century Japanese abacus. Expert practitioners use it with their eyes closed. They don't calculate, they feel the number through their hands.
Sorobaco tries to replicate that. Not by teaching. By watching.
The app tracks your hesitations, errors, recovery time, and rhythm, then adjusts pressure in response. It doesn't tell you if you're good at math. It shows you what your mind does when it's
under load.
No score. No levels. No tutorials. The Soroban is the interface.
Happy to answer questions, especially about the harder design choices, like why the session ends silently without any announcement. That one was genuinely difficult to commit to.
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About Sorobaco on Product Hunt
“No score. No levels. The Soroban observes how you think.”
Sorobaco was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #94 on the daily leaderboard. Sorobaco is not a math game. It is not a calculator trainer. No score, no levels, no explicit feedback. The system watches how you use the Soroban, your hesitations, errors, recovery time, rhythm and adjusts its pressure in response. Three phases gradually take you from full equation visible to pure mental operation, building toward Anzan: arithmetic without reference. The session ends when cognitive friction crosses a threshold. No announcement, no game over screen. The flow simply stops.
Sorobaco was featured in iOS (110.2k followers), Health & Fitness (82.6k followers) and Education (78.4k followers) on Product Hunt. Together, these topics include over 88.2k products, making this a competitive space to launch in.
Who hunted Sorobaco?
Sorobaco was hunted by Luca Infante. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Sorobaco stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Luca Infante