# MintWave Studio

> Independent studio making small, focused mobile apps: offline-first calculators and trackers, and short puzzle, trivia and reflex games. Android apps are on Google Play; Hatch Day is also on the App Store, and iPhone versions of other apps are in progress. Support: support@mintwavestudio.com

All apps: https://www.mintwavestudio.com/apps.html
About the studio: https://www.mintwavestudio.com/about.html
FAQ: https://www.mintwavestudio.com/faq-ai.txt

## Tools & productivity

- [Cable Calc](https://www.mintwavestudio.com/cable-calc.html): Cable sizing and voltage drop calculator for electricians working to IEC 60364 (Europe, Middle East, Africa, India, metric cables): current-carrying capacity per IEC 60364-5-52 Annex B, installation methods A1–E, PVC and XLPE, ambient temperature and grouping derating, breaker selection (Ib ≤ In ≤ Iz), voltage drop per Annex G, Ohm's law. Pro adds earth-fault loop / maximum length checks for TN systems, motor circuits, projects and PDF reports. 9 languages, offline. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.cablecalc
- [Cable size calculator](https://www.mintwavestudio.com/cable-size-calculator.html): free web calculator, current capacity, derating, breaker and voltage drop (IEC 60364, copper, metric mm²).
- [EV charger cable size](https://www.mintwavestudio.com/ev-charger-cable-size.html): free web calculator, 7.4 kW, 11 kW and 22 kW chargers (IEC 60364, copper, metric mm²).
- [Sauna heater cable size](https://www.mintwavestudio.com/sauna-heater-cable-size.html): free web calculator, 4.5 to 10.5 kW three-phase heaters (IEC 60364, copper, metric mm²).
- [Heat pump cable size](https://www.mintwavestudio.com/heat-pump-cable-size.html): free web calculator, sizing the cable to the breaker in the manual (IEC 60364, copper, metric mm²).
- [MultiTimer](https://www.mintwavestudio.com/multitimer.html): Multiple timer app: run many countdown timers, stopwatches and Pomodoro timers at the same time, group them in cards (Kitchen, Workout, Study), exact alarms that work in Doze mode, live notification countdown, presets and history. Pro adds interval/HIIT/Tabata sequences, a home-screen widget, custom alarm sounds, focus stats and backup. No ads, no account, 14 languages. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.multitimer
- [Days Until](https://www.mintwavestudio.com/days-until.html): Expiration date tracker and expiry reminder app: scan best-before and use-by dates with on-device text recognition (custom keywords for any language), countdowns sorted by what expires first, reminders 30 days, 1 week and 1 day before, used/tossed log, "opened" dates, quantities, typical shelf life for fresh food, name suggestions, edit and search, free backup and restore, no item limit. Tracks food, medicine, cosmetics and documents such as passports, ID cards, driver's licences, visas, insurance and warranties. Pro adds custom reminder days, storage locations, a waste tracker, a home-screen widget and CSV export. No ads, no account. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.daysuntil

## Money & budgeting

- [Daily Budget](https://www.mintwavestudio.com/daily-budget.html): Private daily budget planner and expense tracker: shows a daily spending allowance from income minus bills, carries unspent money forward, monthly, weekly, every-2-weeks or twice-a-month pay cycles, a step-by-step breakdown of today's number, big expenses spread over several days or paid from savings, one-off income, editable expenses and bills, under-budget streak, upcoming bills, charts, home-screen widget, daily reminder, backup and CSV import. No bank connection, no ads, budget data stays on the phone. Pro adds multiple budgets with their own currency, category limits with alerts, savings goals, cycle insights, PIN/fingerprint lock and CSV export. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.dailybudget
- [Endly](https://www.mintwavestudio.com/endly.html): Private endometriosis and adenomyosis symptom diary (on Google Play; iPhone version coming soon): pain map, five endometriosis pain scores, cycle, flare log, medication, PDF report for the doctor. No ads, no analytics, data stays on the phone. Not a medical device.
<!-- blog -->
- [Blog](https://www.mintwavestudio.com/blog/): practical guides for the MintWave tools and trackers (RSS: https://www.mintwavestudio.com/blog/feed.xml).
  - [Passport, ID and licence expiry: when to renew and how to never miss it](https://www.mintwavestudio.com/blog/passport-licence-expiry-reminders.html): An expired passport is not found out at home, it is found out at the airport. Here is when to renew each document and how to get a reminder long before it matters.
  - [Pomodoro technique: how to set up your timer and adjust the 25/5 rhythm](https://www.mintwavestudio.com/blog/pomodoro-technique-timer-setup.html): Twenty-five minutes on, five off, a longer break every fourth round. The classic Pomodoro setup works for many people, and it is easy to tune when it does not.
  - [What size breaker for a cable? Match the breaker to the cable (IEC 60364)](https://www.mintwavestudio.com/blog/circuit-breaker-size-for-cable.html): The breaker protects the cable, not the other way round. Pick a breaker at or above the load but never above what the cable can carry.
  - [How much can I spend per day? Work out a daily budget in 5 steps](https://www.mintwavestudio.com/blog/how-much-can-i-spend-per-day.html): A daily budget is what is left after bills and savings, divided by the days until payday. One number you can act on at the checkout, recalculated each morning.
  - [Progesterone timing for dog breeding: when to mate after the LH surge](https://www.mintwavestudio.com/blog/progesterone-timing-dog-breeding.html): Progesterone rises from under 1 ng/mL to about 5 ng/mL at ovulation. Test every one to two days and you can pin down the fertile days instead of guessing from the calendar.
  - [Why didn't my eggs hatch? Causes by candling stage and fixes](https://www.mintwavestudio.com/blog/why-eggs-not-hatching-troubleshooting.html): Work out why your eggs did not hatch by looking at when they failed: clear at day 7, dead at day 10, or fully formed but dead in the shell. Each stage points to different fixes.
  - [Best before vs use by: what food date labels really mean](https://www.mintwavestudio.com/blog/best-before-vs-use-by-dates.html): Use by is a safety date and best before is a quality date. Knowing which is which, and when a product is opened, saves food and money without taking risks.
  - [How to time a whole dinner with several timers at once](https://www.mintwavestudio.com/blog/cooking-multiple-timers-dinner.html): A roast, two sides and a sauce all finish at different times. Working backwards from serving time and giving each step its own timer keeps everything hot together.
  - [What to track in an endometriosis symptom diary (and what to bring to your appointment)](https://www.mintwavestudio.com/blog/endometriosis-symptom-diary.html): Appointments are short and memory is unreliable when you are in pain. A good symptom diary fixes both, if it records the right things.
  - [Voltage drop: why a cable that carries the current can still be too long](https://www.mintwavestudio.com/blog/voltage-drop-cable-too-long.html): Choosing a cable by its current rating is only half the job. Over a long run, voltage drop usually decides the size.
<!-- /blog -->

## Hobby & breeding

- [Hatch Day](https://www.mintwavestudio.com/hatch-day.html): Egg incubation tracker for backyard poultry keepers on Android and iOS (App Store: https://apps.apple.com/app/id6823774178): hatch countdown for 11 species (chicken, duck, goose, quail, turkey and more), daily temperature and humidity targets, turning, candling and lockdown reminders, and a species incubation chart are free (one hatch at a time); Pro adds the candling log, temperature and humidity log, hatch-rate statistics and unlimited hatches. Offline, no account. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.hatchday
<!-- sire-dam app -->
- [Sire & Dam](https://www.mintwavestudio.com/sire-dam.html): Dog breeding app for hobby and professional breeders: heat cycles and next-heat prediction, progesterone stages (ng/mL or nmol/L) and estimated ovulation, best breeding days by semen type, due date from ovulation (63 days) or mating (58–68 days), whelping countdown and temperature log, puppy weights with alerts, buyers and puppy packs. Free for up to 3 dogs, optional Pro. Offline, no account, 8 languages. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.siredam (iPhone version coming soon).
<!-- /sire-dam app -->

## Music practice

- [Rhythm Trainer](https://www.mintwavestudio.com/rhythm-trainer.html): Timing trainer for rhythm game players and drummers: bar notes fall onto a judgement line, every tap judged to the millisecond (PERFECT/GREAT/GOOD/OKAY, early or late), two-hand patterns on the left and right screen halves, short, medium or long runs at 40–240 BPM, results with accuracy, grade, max combo, unstable rate (UR), average offset and section breakdown, offset check with one-tap fix, Bluetooth latency calibration, ghost races via challenge codes, a daily chart the same for everyone, a Timing Coach that finds your timing habits, routines. Pro adds odd meters (5/4, 7/4, 5/8, 6/8, 7/8, Balkan 9/8), advanced hand drills, full stats and custom routines, and removes ads. 14 languages. Free with occasional ads. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.rhythmchallenge

## Games & challenges

- [Shadow Match](https://www.mintwavestudio.com/shadow-match.html): Relaxing 3D perspective puzzle game: rotate a 3D shape until its shadow matches a target silhouette, live alignment meter (95% to solve), daily shadow puzzle with streak, three-star rating by moves, six handcrafted shapes plus endless generated levels, slider mode, hints, no timers, works offline. Free with occasional ads; one-time Premium removes ads. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.shadowmatch
- [Trivia Showtime](https://www.mintwavestudio.com/smart-quiz.html): Trivia game show quiz with a talking host: ten rounds that get harder, pick one of four categories each round, one pass per show, seven correct answers win, a fourth wrong answer ends the show. The host reads every question out loud and reacts to every answer; eight hosts with their own voices and a wardrobe of outfits. Thousands of questions in 14 categories with difficulty levels 1–10, no repeats, normal, relaxed or no timer, works offline, no energy or coins. Daily streak, wins, best score and sharing. Pro unlocks six premium hosts and the full wardrobe, and removes ads on Android. Questions from the Open Trivia Database (CC BY-SA 4.0). Formerly Smart Quiz. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.dailyquiz
- [ZeroMargin](https://www.mintwavestudio.com/zero-margin.html): Perfect-timing stopwatch game: stop the timer at exactly 1, 2, 3, 5 or 10 seconds or any custom time from 0.5 to 60 s, tap anywhere to stop, error shown in milliseconds, personal best per target, lag-free touch timestamps, daily target the same for every player, rank tiers from Rookie to Zero, achievements, streak and continuous modes, Easy/Medium/Hard bots, 2-player duels on one device. One-time Pro adds Blind mode, moving targets, the Gauntlet, ghost of your best and neon themes, and removes ads. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.zeromargin
- [Steady Hand](https://www.mintwavestudio.com/steady-hand.html): Steady hand test and hold-still challenge game: hold the phone still for 5, 10 or 15 seconds, the motion sensor scores steadiness 0–100 with ranks S to D, results explained with a rank ladder and a tip, comparison with your best and last test, one-tap retry and quick start, daily challenge with streak, achievements, calm-focus breathing warm-up, share score. One-time Pro adds party mode for 2–6 players, Balance Ball, 30/60-second endurance tests, progress chart and grip comparison, no ads. For entertainment only, not a medical device. Google Play: https://play.google.com/store/apps/details?id=com.mintwave.steadyhand

## Free tools and guides

- [Voltage drop calculator](https://www.mintwavestudio.com/voltage-drop-calculator.html): IEC 60364-5-52 Annex G voltage drop for single-phase, three-phase and DC copper circuits.
- [Daily budget calculator](https://www.mintwavestudio.com/daily-budget-calculator.html): how much you can spend per day until payday.
- [Days until calculator](https://www.mintwavestudio.com/days-until-calculator.html): days, weeks and working days until a date.
- [Stop the timer game](https://www.mintwavestudio.com/stop-the-timer-game.html): try to stop a stopwatch at exactly 1.000 seconds.
- [Odd time signatures](https://www.mintwavestudio.com/odd-time-signatures.html): how to count 5/4, 7/4, 5/8, 6/8, 7/8 and 9/8, with a click track.
- [Hatch date calculator](https://www.mintwavestudio.com/hatch-date-calculator.html): hatch, candling and lockdown dates for 11 bird species.
- [Incubation chart](https://www.mintwavestudio.com/incubation-chart.html): incubation temperature, humidity and days for 11 species.
- [Candling guide](https://www.mintwavestudio.com/candling-guide.html), [Incubator humidity guide](https://www.mintwavestudio.com/incubator-humidity-guide.html), [Quail incubation](https://www.mintwavestudio.com/quail-incubation.html)
<!-- sire-dam tools -->
- [Dog pregnancy calculator](https://www.mintwavestudio.com/dog-pregnancy-calculator.html): whelping date and a day-by-day pregnancy timeline.
- [Progesterone levels chart and ovulation calculator](https://www.mintwavestudio.com/dog-progesterone-levels-chart.html): ovulation day and best days to breed.
- [Dog heat cycle calculator](https://www.mintwavestudio.com/dog-heat-cycle-calculator.html): when the next heat is due.
- [Puppy weight gain calculator](https://www.mintwavestudio.com/puppy-weight-gain-calculator.html): checks whether a newborn puppy is gaining enough.
- Dog pregnancy calculator in other languages: https://www.mintwavestudio.com/de/hund-traechtigkeit-rechner.html, https://www.mintwavestudio.com/fr/calcul-gestation-chienne.html, https://www.mintwavestudio.com/es/calculadora-gestacion-perra.html, https://www.mintwavestudio.com/it/calcolo-gravidanza-cane.html, https://www.mintwavestudio.com/nl/drachtigheid-hond-berekenen.html, https://www.mintwavestudio.com/pl/kalkulator-ciazy-suki.html, https://www.mintwavestudio.com/pt/calculadora-gestacao-cadela.html
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## Policies

- [About MintWave Studio](https://www.mintwavestudio.com/about.html)
- [Brand and app names](https://www.mintwavestudio.com/brand.txt)
- [AI usage policy](https://www.mintwavestudio.com/ai.txt)
- [Privacy policy](https://www.mintwavestudio.com/privacy-policy.html)
- [Terms & Conditions](https://www.mintwavestudio.com/terms-and-conditions.html)