Dencho

The tape calculator you can edit — fix a line, it recomputes

Marketing & SEO Product Hunt Launched Jul 22, 2026 by Yuya Tanaka yuyatanaka View original post ↗

A calculator that keeps its working on a tape you can edit. Tap any line — value, operator, or operand — and everything below recomputes. Full-precision Decimal, per-sheet rounding & tax, named sheets with totals. One-time $4.99 / ¥800, no ads, on-device.

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