{"by":"wooby","descendants":0,"id":47063311,"score":2,"text":"I built GridCalc, an RPN spreadsheet for iOS.<p>It combines the efficiency of Reverse Polish Notation with the visible structure and reactivity of a spreadsheet. You enter numbers and operators step by step, and you can retroactively change any value. All dependent calculations update immediately.<p>I love spreadsheets but I've never liked how cramped traditional spreadsheets feel on a phone. My goal was to make ad‑hoc, spreadsheet-like calculation on a phone feel direct and fluid.<p>Here’s a short demo:\n<a href=\"https://youtu.be/M0HwzrGGuyc\" rel=\"nofollow\">https://youtu.be/M0HwzrGGuyc</a><p>App Store link:\n<a href=\"https://apps.apple.com/us/app/gridcalc/id6759011187\">https://apps.apple.com/us/app/gridcalc/id6759011187</a><p>Happy to answer questions.","time":1771434463,"title":"Show HN: GridCalc, an RPN Spreadsheet for iOS","type":"story"}