Comparison

Orchidometer vs YO Home Sperm Test

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Orchidometer

This medical app helps users measure and track testicular volume. It can be used to assess normal development, identify potential associations with conditions like Klinefelter syndrome or testicular atrophy, and monitor changes over time.

Highlights
  • Measure testicular volume
  • Track volume changes
  • Estimate Tanner stage
  • Assess pubertal development
  • Save and visualize measurements
  • Identify potential medical associations
Features
Currently charting
Read full description

Check if your testicular volume is normal with the Orchidometer app. Find out if your volume is associated with Klinefelter syndrome or testicular atrophy. Measure testicular volume with the Orchidometer for iPhone. The orchidometer is highly customizable and automatically adjusts itself to your screen size. It can be used to estimate Tanner stage, age and pubertal development. Measurements can be saved and visualised for both testicles. The Orchidometer app can be used to track the testicle’s volume while on TRT or when you suffer from testicular atrophy, low testosterone or infertility. The app can also be used as an indication for Klinefelter syndrome. Whether you're an endocrinologist, pediatrician or just interested in measuring testicular volume: this app will replace your classic orchidometer.

About

YO Home Sperm Test

This app transforms your smartphone into a semen analysis platform, assessing key metrics like sperm concentration and motility in minutes. It offers laboratory-grade analysis privately at home and records a video of sperm for viewing or sharing with experts. Resources are available to help enhance fertility.

Highlights
  • Sperm concentration analysis
  • Sperm motility assessment
  • Video recording of sperm
  • Private home testing
  • Fertility enhancement resources
  • Secure result storage
Features
Read full description

Easily and accurately check your sperm with the YO Home Sperm Test (purchase of Test Kit required). This app transforms your smartphone into a semen analysis platform, assessing key metrics such as Sperm Concentration, Motility %, Progressive Motility %, Motile Sperm Concentration, and Progressive Motile Sperm Concentration in about 3 minutes. Experience laboratory-grade semen analysis in the privacy of your home without the need to mail in your sample. The YO app also records a video of your sperm, which you can view or share with an expert for further analysis. Discover if your sperm parameters fall within the "Normal" range and explore ways to enhance your fertility through the app’s resources. Should your test results be low, the app recommends consulting a medical professional and can facilitate sharing your test report with them. The YO Home Sperm Test is over 97% accurate compared to laboratory semen analysis. It is FDA-cleared for over-the-counter use and has been rigorously tested for precision, accuracy, and usability by Medical Electronic Systems and independent organizations. With more than 20 years of experience in automated sperm testing, we are proud to offer this private, quick, and reliable solution at an affordable price point. To use the YO Home Sperm Test, download the app and purchase the affordable YO Test Kit from our website (www.yospermtest.com). The kit includes all necessary supplies for three tests, along with a YO Testing Device. For detailed information on how the YO works, please visit our website. The app, used in conjunction with the YO Testing Device, evaluates and displays a video of your sperm analysis results, including Sperm Concentration, Motility %, Progressive Motility %, Motile Sperm Concentration, and Progressive Motile Sperm Concentration. It will show is your results are in the Normal or Abnormal category, and provide detailed explanations. The YO Home Sperm Test App guides you through each step of the testing process with written and animated instructions on your smartphone. Your test results and videos are securely stored in the YO archive and can remain private or be shared with a professional if you choose. Conduct a private semen analysis with the YO Home Sperm Test. And “Remember, it all Started with a Sperm and an Egg! YO is approved as a CLASS 2 over-the-counter medical device in the U.S.A (FDA), Europe and the UK (CE), Australia (TGA), Canada (Health Canada), and other locations including India, Vietnam, Taiwan, Israel, Japan and more. Disclaimer: Before making any medical decision based on the YO Home Sperm Test, note that YO is not intended to replace a comprehensive male fertility evaluation by a doctor. YO is an initial screening tool. If you are having trouble achieving a pregnancy or have results below the normal reference ranges, please see a doctor for a professional consultation.

Screenshots

Orchidometer4 screens
YO Home Sperm Test4 screens

Verdict

The call

Orchidometer and YO Home Sperm Test both sit at 4.0 stars, but that hides the real split: 100% of Orchidometer's written reviews are positive against 25% of YO Home Sperm Test's. Orchidometer also leads on update cadence (every 11 days vs every 2 months) and chart position (#81 vs unranked). YO Home Sperm Test's advantage is price (Free vs $7.99) and ratings volume (90 vs 2). On rating, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

YO Home Sperm Test is free to download; Orchidometer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for Orchidometer against 3.9 for YO Home Sperm Test. That said, the two scores are not equally well evidenced: YO Home Sperm Test has 90 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 100% of Orchidometer's written reviews are positive against 25% of YO Home Sperm Test's.

UpkeepUpdate frequency

Orchidometer ships an update every 11 days, YO Home Sperm Test every 2 months. Both last shipped on November 3, 2026.

Scorecard6 real differences · 5 level
Orchidometer versus YO Home Sperm Test: the parameters behind the verdict, then further details
ParameterOrchidometerYO Home Sperm Test
Price$7.99Free — better
Rating4.0 (2 ratings) — better3.9 (90 ratings)
Positive reviews100.0% of reviews — better25.0% of reviews
Number of ratings290 — better
Update frequencyEvery 11 days — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree with in-app purchases — better
Best chart rank#81 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size15 MB103 MB
Age rating12+17+
DeveloperTotalContentMedical Electronic Systems

Customer experience

Orchidometer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

YO Home Sperm Test

All ratings72 ratings
Positive66.7%
Neutral4.2%
Negative29.2%
Written reviews16 reviews
Positive25.0%
Neutral18.8%
Negative56.3%

In-app purchases

None

Orchidometer

No in-app purchases

None

YO Home Sperm Test

No in-app purchases

Questions

Is Orchidometer free?
Orchidometer costs $7.99, with no in-app purchases.
Is YO Home Sperm Test free?
YO Home Sperm Test is free to download, with no in-app purchases.
Which has better reviews, Orchidometer or YO Home Sperm Test?
Orchidometer is rated higher. Orchidometer averages 4.0 out of 5 from 2 ratings, while YO Home Sperm Test averages 3.9 from 90 ratings.
Do Orchidometer or YO Home Sperm Test have ads?
Neither Orchidometer nor YO Home Sperm Test shows ads.
Which is updated more often, Orchidometer or YO Home Sperm Test?
Orchidometer ships an update every 11 days, and YO Home Sperm Test every 2 months. Most recently, Orchidometer was updated on November 3, 2026 and YO Home Sperm Test on November 3, 2026.

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