A team of Japanese IT developers, driven by a passion for technology

We are Yomoe Studio, a small and focused development team. We're currently working on several apps and games — stay tuned.

• Sudoku

  A quiet study, one puzzle at a time. Yomoe Sudoku brings the feel of pencil on paper to your phone. Every puzzle is generated on your own device and checked to have exactly one solution. No connection needed — on a plane, underground, or anywhere else, your next puzzle is already there. ■ Five ways to play - Classic: pick Easy through Expert and solve one at your own pace. - Daily Challenge: one puzzle a day, the same one for everyone in the world. Stamps fill your calendar and your streak grows. - Journey: 6 chapters of 20 levels, 120 in all — from gentle 4x4 grids up to Expert. - Speed: a timed single puzzle, plus a sprint that keeps them coming. - Zen: no timer, no mistake count. A calm, low-contrast board and nothing but thinking. ■ Help that teaches Candidate notes, row/column/box highlighting, and matching-number emphasis. When you are stuck, a hint tells you why that digit belongs there — so you learn the technique, not just the answer. Slips can be undone as many times as you like. ■ Worth coming back to Best times and three-star rates per mode and difficulty, achievements and trophies, and your daily streak. There are no leaderboards to compete on. The only one you are measured against is yesterday's you. ■ Built to be comfortable Everything within reach of one hand, a left-handed mode, and colour-blind friendly marking. 10 languages. Portrait only. ■ Pro version (one-time purchase) - No ads - Unlimited hints (free: 3 per puzzle, plus more by watching a video) - All 5 board themes unlocked (Study Paper, Night Ink, Celadon, Ochre, Bamboo Dew) The free version still gives you all five modes, all 120 levels, and every achievement and statistic, with nothing held back. Pro only buys you an uninterrupted screen and a change of scenery.

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• Diet Tracker

  A diet tracking app that keeps your weight, meals, exercise, and menstrual cycle all in one place. No account required. Everything you log is stored only on your device and is never sent to our servers. Backup export and import are built in, so your records come with you when you change phones. ■ What you can log • Weight: see your trend at a glance on a line chart • Meals: logged as breakfast, lunch, dinner, or snack, with up to 3 photos each • Exercise: pick an activity and duration, and calories burned are estimated from your weight • Water: one tap per glass • Body measurements: waist, hips, and other areas • Bowel movements: a quick daily check • Menstrual cycle: calendar view with estimated next period and ovulation dates (shown only when your profile gender is female) ■ Built to keep you going • Streak counter and 20 badges to collect • Weekly and monthly charts for weight change, total exercise time and calories, and water intake • BMI, body fat, and basal metabolic rate estimates • Pick a weekly pace with a slider and see your projected goal date ■ About Pro (one-time purchase) The free version gives you every core feature — logging, charts and backup. A single purchase upgrades you to Pro, which adds: • No ads anywhere in the app • Full history in the statistics charts (the free version shows the last 3 months) • All 8 theme colors unlocked (the free version has 2) Languages: English, Japanese, Chinese (Simplified and Traditional), Korean, Spanish, French, German, Italian and Portuguese Note: This app is a logging and charting tool, not a medical device. BMI, body fat, basal metabolic rate, goal date projections, and period and ovulation estimates are reference values based on general formulas and what you enter — they are not medical diagnosis, advice or guidance. Period and ovulation estimates must not be used for contraception or for planning a pregnancy. If you have a medical condition, are pregnant or breastfeeding, or have any concerns about your health, please consult a doctor or other professional before using this app.

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• Sep 1, 2026

  My First App Is Now Live! 🎉

  Hello everyone! I’m excited to announce that my very first app is now available starting today! Diet Tracker: ⁠https://yomoestudio.com/apps/com.yomoestudio.live.diet My next app is already in the works. Stay tuned! 😊

• Jul 26, 2026

  Our very first app is coming soon!

  We’re putting the finishing touches on it and can’t wait to share it with you. Stay tuned!

• Jul 26, 2026

  We are pleased to announce that our website is now live

  Our website features information about our services, as well as the latest news and updates. Thank you for your continued support.

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