iPhone app, free during the launch period
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.
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Free to download, every Premium feature included during the launch period. No ads, no data selling, and you can delete everything in one tap.
Motily works best with a sperm test at the start and another from day 74. We rated 11 at-home tests on the same three criteria, and these two came out top of their type.
Volume, concentration, motility and total motile count on your phone, about 15 minutes after the sample rests for 20. CE-IVD marked, delivered to the UK and EU.
£85.50 for 2 tests with code MOTILY (£94.99 without; checked 8 October 2026)
Get ExSeed, 10% off applied (affiliate link) Code MOTILY: 10% off (affiliate code, not valid on subscriptions).
Up to 22 parameters on the Advanced kit, including DNA fragmentation and vitality, in a CAP-accredited lab, with results within 24 hours of the lab receiving the sample. US only, not New York, Alaska, Hawaii or Puerto Rico.
$249 Comprehensive or $440 Advanced, return shipping included
ExSeed's link and code MOTILY are affiliate: Motily earns a commission if you buy through either, at no extra cost to you. We have agreed an affiliate deal with Mate Health; until its affiliate link is live, the Mate Health link earns us nothing. How we rate tests and choose partners.
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, and builds testing in: a home test at the start, your numbers against the WHO limits, and a retest on day 74.
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.
A two-minute daily check-in, a score for the day, a longer-term Motily score, streaks, next steps that show what each change is worth, and a 74-day journey with a mascot called Remy.
Start with an at-home sperm test, such as ExSeed's CE-marked kit, which you can order from inside the app (an affiliate link: Motily earns a commission), then log the numbers and see each one against the WHO reference limits. On day 74 Motily prompts a retest, so you can see what changed; the 74-day kit page sets out the two tests. If a result is below a limit, it points you to your GP first.
Check in, play Myth or Fact, answer Today's question. Today shows one thing at a time, and an All done card when the day is finished.
How you slept, what you drank, whether the laptop sat on your lap. Each habit is a tap or two, Apple Health can prefill sleep and workouts, and Same as yesterday fills in the answers that haven't changed.
Three statements about sperm health, unlocked by your check-in. Call each one myth or fact, then see the answer with a one-line explanation and its source. It takes under a minute, and you learn something real each day.
One question a day about your own habits, also unlocked by your check-in, such as how often you have sex when you're trying to conceive. Your answer shows what the research links that habit to, with the number and the source behind it, and one thing to try where there is one. Every answer is kept in See all your findings, and the things to try feed Next steps on Home.
Today's Motily points climb as you log, and the habits with the strongest evidence carry the most weight. Your Motily score blends your baseline with your last seven days, and Next steps shows how many points each change would add. A streak builds, and Rest Days protect it when life happens.
Every rating on the UK App Store so far is five stars. Motily launched on 29 September 2026, and some of its early reviewers heard about it from its founder or his friends.
My partner and I have been trying for a while and I didn't know where to start on my side of things. Motily has made it so simple. I really like streaks and badges that give me a reason to come back, and it feels supportive rather than clinical…
My husband got me to download this so i could see his progress via the partners page, and its so nice for both of us to feel like we’re in it together. Great app
The interface is intuitive and accessible… The UI is well designed and there’s a social tab which facilitates goofy, friendly competition in a way reminiscent of gym and running apps.
Downloaded Motily to support a mate and now I’m hooked… Remy the cartoon swimmer is a great touch, and the lab results explainer is a game changer.
Works really smoothly - nice UI, easy to navigate, and makes it straightforward to keep on top of my habits.
…Checking each day and seeing my score slowly tick up is a highlight of my day.
Quoted as written from the UK App Store, checked 6 October 2026. Some reviews are trimmed (marked …) to the part about using the app; we left out lines about health results, because Motily tracks habits and can't promise outcomes. Read every review on the App Store.
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.
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.
Guide: Sleep and sperm
Alcohol, smoking and caffeine. Smoking is one of the most consistently confirmed factors, and heavy drinking is linked to poorer sperm quality.
Guides: Alcohol, Smoking and vaping, Caffeine
Laptops on your lap, hot tubs, saunas, tight underwear. Extra heat around the testicles can temporarily lower sperm production, and it's reversible.
Guide: Heat and sperm
Moderate and regular beats none or extreme. Aim for 25 to 45 minutes of moderate activity most days.
Guide: Exercise and cycling
More whole, unprocessed food. Antioxidants, omega-3s, zinc, selenium and folate are the nutrients worth knowing about.
Guide: Diet for sperm health
Ongoing stress is linked to hormonal changes that can affect testosterone and sperm production over time. Small, repeatable resets help most.
Guide: Stress and sperm
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.
Newer research suggests ejaculating roughly every 1 to 2 days is linked to better sperm movement and healthier DNA than long gaps.
Guide: How often to ejaculate
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.
Stem cells in the testes divide repeatedly to build up the raw supply. This stage sets the volume for everything that follows.
Meiosis halves the chromosome count and reshuffles genetic material into smaller, genetically distinct cells.
Each round spermatid grows a tail, compacts its DNA and sheds extra cytoplasm until it looks like a recognizable sperm cell.
New sperm travel into the epididymis, where they gain the ability to swim and the readiness to fertilize an egg.
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.
No report yet? Start with a home test. The at-home tests compared shows what each one measures, what it costs and where it ships, from a count-only strip to a full mail-in lab analysis.
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.
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.
The same evidence the app is built on, written up so you can read it without the app. All guides, all tools and all comparisons.
Every factor ranked by evidence, with effect sizes and how long each one takes to show.
Each line of the report against the WHO 2021 limit, and why one test is not a verdict.
Nine apps side by side, sourced, with our own app in the table and its weaker points named.
Eleven tests, from a count-only strip to a full mail-in lab analysis: what each measures, costs and where it ships.
Motily is on the App Store. Free to download, and every Premium feature is free for everyone during the launch period. Two minutes a day, and the 74-day journey starts on day one.
Want a starting number first? See the best-rated sperm tests.
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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.
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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 the people using it say something's wrong. More about who builds Motily and how the science on this site is checked.
