Sperm health, two minutes a day.
Motily is a daily check-in for men who want to support their fertility, whether you're trying for a baby now or planning ahead. Log eight habits that research links to sperm quality, get a score for the day, and follow the 74-day cycle your body takes to make new sperm.
Free during the beta, Premium included. No ads, no data selling, and you can delete everything in one tap.
- Sleep7 to 8 h
- SubstancesAlcohol-free
- NutritionMostly whole
- Exercise30 min
- HeatNone
- HydrationLog
- Mood & stressLog
- IntercourseLog
A habit app for the 74 days before conception.
Motily is an iPhone app for men who are trying to conceive, planning to, or who have had a semen analysis and want to act on it. It turns the lifestyle research on sperm health into a daily routine you can actually keep.
Who it's for
Men aged 18 and over. Trying now, trying after a setback, going through fertility treatment alongside a clinic, or simply planning ahead. Partners get their own page without installing anything.
What it does
A two-minute daily check-in, a score for the day, a longer-term Overall score, streaks, a 74-day journey with a mascot called Remy, and a place to log semen analysis results against WHO reference limits.
What it doesn't do
It doesn't diagnose, treat or promise anything. Your score reflects your habits, not your fertility. Where the evidence is mixed the app says "may" and "is linked to", and it tells you when to talk to a doctor.
Three steps, most days, for 74 days.
You don't need a new routine. You need to notice the one you already have, and nudge it.
Answer eight quick questions
How you slept, what you drank, whether the laptop sat on your lap. Each category is a tap or two, and Apple Health can prefill sleep and workouts. Two minutes, done.
See today's score and what moved it
Your score out of 100 climbs as you log. The categories with the strongest evidence, like nutrition, substances and sleep, carry the most weight, so you always know where the points are.
Keep the streak, watch the trend
A streak builds, Rest Days protect it when life happens, and your Overall score blends your baseline with your last seven days. Remy, your swimmer companion, celebrates the milestones.
Eight habits, one honest picture.
Every category in Motily is there because research links it to sperm health. Where the evidence is mixed, the app says so. Read the science and the sources.
Sleep
Around 7 to 8 hours a night is the sweet spot. Too little and irregular sleep are both linked to lower testosterone and weaker sperm quality.
Substances
Alcohol, smoking and caffeine. Smoking is one of the most consistently confirmed factors, and heavy drinking is linked to poorer sperm quality.
Heat
Laptops on your lap, hot tubs, saunas, tight underwear. Extra heat around the testicles can temporarily lower sperm production, and it's reversible.
Exercise
Moderate and regular beats none or extreme. Aim for 25 to 45 minutes of moderate activity most days.
Nutrition
More whole, unprocessed food. Antioxidants, omega-3s, zinc, selenium and folate are the nutrients worth knowing about.
Mood & stress
Ongoing stress is linked to hormonal changes that can affect testosterone and sperm production over time. Small, repeatable resets help most.
Hydration
Semen is mostly water. Roughly 2 to 3 liters a day is a reasonable target, and the app is honest that this one rests on general guidance.
Intercourse
Newer research suggests ejaculating roughly every 1 to 2 days is linked to better sperm movement and healthier DNA than long gaps.
Why 74 days?
Because the sperm you'll have in two and a half months are being built right now, and habits change what gets built.
Sperm aren't kept in stock. They're made continuously in the testes through a process called spermatogenesis: stem cells divide to build up a supply, those cells go through a special kind of division that halves and reshuffles their genetic material, the results physically transform (growing a tail and compacting their DNA into a streamlined head), and finally they spend a couple of weeks in the epididymis learning to swim. The classic estimate for the whole process is about 74 days, so anything you change today, from cutting back on drinking to sleeping properly, takes roughly that long to show up in the sperm you actually produce. That's why Motily's journey is 74 days long, with each stretch tied to the habits that matter most while that stage is happening.
Sources on exact timing don't agree to the day, so the phases below are deliberately rough. Motily never shows you an exact day cutoff. The science page has the timeline and the sources.
Division & multiplication
Stem cells in the testes divide repeatedly to build up the raw supply. This stage sets the volume for everything that follows.
Reshaping into spermatids
Meiosis halves the chromosome count and reshuffles genetic material into smaller, genetically distinct cells.
Taking shape
Each round spermatid grows a tail, compacts its DNA and sheds extra cytoplasm until it looks like a recognizable sperm cell.
Learning to swim
New sperm travel into the epididymis, where they gain the ability to swim and the readiness to fertilize an egg.
Bring your lab report. Get context, not a verdict.
Add the numbers from a semen analysis (volume, concentration, total count, motility, and optional measures like morphology or DNA fragmentation) and Motily shows each one against the WHO 6th edition reference limits, then tracks how they move between reports. It's a reference range, never a diagnosis: interpreting a lab report is your clinician's job, and the app says so.
Supports and informs. Doesn't diagnose or promise.
Motily is a lifestyle tool, not a medical device. Your score is an estimate built from your habits, not a measure of your fertility. Where the evidence is preliminary, like hydration or epigenetics, the copy says "may" and "is linked to" rather than pretending certainty. If you've been trying for 12 months (or 6, if your partner is 35 or older), talk to a specialist. That's a proactive step, not a sign anything's wrong.
A page for her. No install, no account.
Share a link and a 6-character code from Profile, and your partner gets a page that shows where you are in your 74 days, your streak, and whether today's check-in is done. She can send a nudge. She never sees your answers, your score or your reports, and either of you can disconnect at any time.
If she wants to, she can also share her fertile window, so it shows up on your Today tab when timing matters most. That part is Premium, and it's opt-in for both of you.
Prefer a mate to a partner? Pair with a friend as your Wingman and keep a shared streak: it counts the days you both logged, and one miss a week is forgiven automatically.
Help shape Motily before launch.
Motily is in a private beta on iPhone, installed through TestFlight. Use it for real and say what's confusing, what's missing and what made you smile.
Premium is free during the beta. Nothing is charged, no card is asked for, and everything you log stays yours whichever plan you're on afterwards.
- 1Install TestFlight from the App Store on your iPhone.
- 2Open the invite link and tap Accept, then Install.
- 3Sign in with Apple, Google or email, answer the onboarding quiz, and log your first day.
- 4Send feedback from Profile, or the Feedback row on Home, whenever something's off.
Stored in the UK
Your answers live in a London data region, behind row-level security, so the database refuses to return your rows to anyone but you.
No ads, no selling, no tracking
No advertising SDKs, no ad identifiers, no location, no cross-app tracking. A crash reporter and an optional usage counter, and neither ever sees your answers.
Delete everything, any time
Profile, then Delete account. Immediate, complete, and you don't have to email anyone. Read the full privacy policy.
One person, in the UK.
Motily is built and run by a solo founder in the United Kingdom, not a studio or a clinic. That means replies to hello@motily.app come from the person who wrote the code, and it means the app is small enough to change quickly when beta testers say something's wrong.