Introducing "Ei Nano" - the ultimate healthcare app designed to meticulously track and manage your daily self-pleasure activities.

Wondering about your last session? The dynamic calendar view lets you quickly revisit past activities and better understand your unique cycle, optimizing your physical and mental well-being.

Let me also explain the features below.

Notes:
* Quickly jot down details about each session.
* Add personal notes to reflect on your experiences and feelings.

Stopwatch:
* You can use the stopwatch for recording.
* No matter how engrossed you become in self-pleasure, starting the stopwatch ensures you won't forget to record.

Calendar:
* You can toggle between statistics/analysis and the calendar view.
* In the calendar, you can view records for each month.

Periods:
* By turning on the feature in settings, you can register your periods.
* Based on recorded periods, it predicts the next period and ovulation day.
* You can check the correlation between self-pleasure and period days.

Share as an Image
* Each section of the statistics/analysis can be shared or sent as an image.
* Feel free to use it for posting on social media, etc.

Date range:
* You can change the period for analyzing statistics.
* Options include All time, Last 7 days, Last 30 days, Last 90 days, Last 180 days, Last 365 days, This year, and Last year.

Backup:
* Supports the built-in "Auto Backup" on Android devices (up to 25MB).
* Allows manual backup to Google Drive from within the app, with the option to restore as needed.

The following data is presented as statistics/analysis.

Last time & Biorhythm:
* You can check the date and time of the last self-pleasure session and its cycle in a line graph.
* Tap each marker on the line graph to check the index for that date.
* If you maintain self-pleasure once a day, the index is 1.00.
* For men, a Harvard University study found that engaging in self-pleasure more than 21 times a month lowers the risk of prostate cancer. With 21 times a month (or 5 times a week), the approximate index is around 0.72.
* The index can be used as a target of 0.72 or to track fluctuations in frequency when it temporarily increases or decreases.
* Unstable biorhythms might be a sign that your body and mind are not in a normal state. Understanding your biorhythm can help with health management.

Day of the week:
* You can check the statistics by day of the week.
* You can also see the total for weekdays and weekends.

Time of day:
* You can check statistics by time of day.
* Time periods are classified as morning, afternoon, evening, and night.

Duration:
* View the time spent on each session in minutes.
* Check the longest, shortest, and average times.
* Tap to see detailed records.

Top tags:
* Check the frequency of tags for each record in descending order.
* Tap each tag to view a list of records.
* Added tags can be edited or deleted later.
* The "Top tags" section appears only if there are tags set; if none, it will not be displayed.

Pornography & Pleasure Toys:
* Check usage statistics for each category.
* Tap an item to see records.

Orgasms:
* Check orgasm statistics during self-pleasure.
* Tap to see records.

Enjoy styles:
* Check the number of participants during self-pleasure.
* See if it was alone, with two people, or with multiple people, and tap to view records.

Enjoy Ei Nano ad-free with Premium!

Export to file:
* Export saved records to a CSV file.
* The encoding is UTF-8.

Import from file:
* Import records from a CSV file.
* Only files in the same format as the exported CSV are valid, and the file language must match the app’s language.

Other benefits:
* Custom range.
* Changes theme color (Snow, Chocolate, Sakura, Rapeseed flower, Hydrangea, Savannah, Soda, Pistachio, Maple, Ghost, Mont Blanc, and Wreath).
* Records location (Home, Hotel, Office, School, Open Air, Public, and Transport).
* Records place (Bedroom, Living Room, Bathroom, Kitchen, Laundry, Terrace, and Garage).