フリマ・せどり利益計算 vs Grind Timer

簡単に素早く利益・利益率の計算！ フリマやせどりの利益計算に！ ・配送料・手数料・包装料の値が保存されるので手間が少ない ・2セットの値を保存、切替可能

GrindTimer is more than a habit tracker — it's a focus timer designed to help you turn your time into skills. Whether you're working on a side hustle, studying for a certification, or building creative output, GrindTimer makes your effort visible. Set a monthly time goal, and the app automatically calculates how much you need to do each day. Every session you clock in brings you closer to your goal — no guesswork, just real progress. AI gives you written feedback on your performance, helping you reflect and stay motivated. And with a visual calendar and ranking system, you can see how far you've come — and who's on the journey with you. Features Set monthly or daily time goals — daily targets are auto-calculated Record activity with a built-in timer using Clock In / Clock Out buttons Review your activity on a color-coded calendar Get AI-generated written feedback on your effort (Premium) Compare progress with others via the Ranking system (Premium) Manage multiple goals across categories like Study, Work, or Hobby Focus without ads (optional Premium upgrade) Final CTA Don’t just build habits — build your future. Turn your time into skills with GrindTimer. Start today. Terms of Servise : https://skillful-filament-bce.notion.site/Terms-of-Service-21057a3f131b80f893bdddd96226725d?source=copy_link #habittracker #timemanagement #sidehustle #study #ai #productivity #ranking