Android app – Reminder FLEX all features

2026.02.10

Convenient Self-Management Features of Reminder FLEX:

Snooze (Short-interval Repeat)

Alerts can be repeated every minute to several hours. For example, by setting a snooze to go off every 5 minutes to prevent forgetting medication, even if you miss the first alert, it will continue to sound every 5 minutes, ensuring you notice and take your medicine. Combining this with the Repeat function allows you to automate this daily.

  • You can specify the interval in minutes and the total number of alerts.

Repeat

You can repeat alarms/notifications daily, every 1-5 days (or every 2-6 days), every weekday, weekly, bi-weekly, monthly, on a specific day of the month (1st/2nd/3rd/4th specified day of the week), yearly, or on a specific day of a specific month annually. For example, if you want to check your bank balance on the 20th of every month, setting a monthly repeat will alert you on the 20th of every month. It is ideal for birthdays, routine work, medication, and other recurring schedules.

Automatic Month-End Adjustment

For instance, if a reminder is set to repeat on the 31st of every month, after the January 31st alert, it will automatically adjust to ring on February 28th and then correctly return to the 31st for March.

 

Notify me in advance (Early alerts)

Prevents forgetfulness by notifying or reading aloud several days in advance, such as “In 5 days: 〇〇’s Birthday.” Since you can notice early, you have plenty of time to prepare gifts or arrangements.

  • Countdown is possible (3 days, 2 days, 1 day before).
  • Combining with Repeat ensures you are notified in advance every month or year.
  • Advance notifications can be set from 2 weeks to 5 minutes prior.

Simultaneous Use of Snooze, Repeat, and Advance Notice

“Advance Notice,” “Snooze,” and “Repeat” can all be set simultaneously for a single reminder. You can flexibly configure alerts to ensure you never forget your schedule.

To-Do List

The reminder list functions as a checklist. By checking ✅ once a task is finished, the reminder automatically moves to its next repeat date.

Bulk Changes for Shifts

For irregular schedules like work shifts, you can select multiple tasks by sliding your finger over them and change the date/time to the next working day all at once.

Character Praise Feature

When you mark a task as completed ✔, a character appears to offer a word of appreciation. This helps maintain motivation for daily routines.

“Days Remaining” (Minutes Remaining) Display

The checklist itself shows how many days are left, making schedule management easy.
– For tasks on the current or following day, a countdown of hours and minutes is also displayed.

Selectable Date Formats (Including Japanese Era)

Both Western and Japanese era (Reiwa) formats are available for date display.
Simple international date formats are also selectable.

Selectable Time Formats

You can choose between 12-hour (1:00 PM) and 24-hour (23:00) formats.

History Logs / Diary to Track Activity

Completed tasks are saved in the history. Since you can add notes or diary entries—such as “Gave 5ml of fertilizer today”—you can look back and check even if you forget when or how much fertilizer you applied previously.

Choose Alert Method: Notification, Alarm, or Voice

Choose between Alarm, Notification, or Text-to-Speech for each reminder. Use “Notification” for a simple chime. Use “Voice Reading” for spoken alerts like “It’s time for your medicine” (also useful as a time signal). For important schedules, you can use “Alarm” to play a melody for a set duration.

    Alarm

    Independent Alarm Volume

    The alarm volume can be adjusted for each individual reminder.
    Set a loud volume for important tasks and a subtle one for routine alerts.

    Independent Alarm Melody

    The alarm sound (melody) can be changed per reminder.
    You can also specify your own audio files, such as MP3s, from your device.

    Independent Alarm Duration

    The alarm duration can be specified for each reminder, ranging from 5 seconds to 3 minutes.

    Play Alarm Even in Silent Mode

    Like a native system alarm app, you can set the reminder alarm to sound even when the device is in silent mode. This is a vital feature for those who want to ensure they don’t miss schedules even when the phone is silenced. Detailed settings, such as whether to sound during “Do Not Disturb,” are also available.

    Simultaneous Vibration and Sound

    You can set the device to vibrate while the alarm melody is playing.

    Stop Lock Screen Alarm with Volume Buttons

    When an alarm sounds while the device is locked, you can stop it by pressing the physical volume buttons on the side of the device (this can be disabled).

    Voice Reading (Text-to-Speech)

    Volume Specification

    Set the specific volume for voice reading.

    Silent Mode Voice Settings

    Configure whether the app should speak during silent mode. Detailed options include whether to speak during “Do Not Disturb.”

    Earphone-Only Voice Reading 👑

    A switch is available to ensure voice reading only comes through earphones when they are connected.

    Read Twice 👑

    Option to read the title twice.

    Read Memo Instead of Title 👑

    It is also possible to have the memo read aloud instead of the title.

     

    Alert ON/OFF Button

    If you want to keep a task on your checklist but don’t need an alert, you can disable the sound for that specific task with a single button press.

    Mute All Alerts

    When in meetings, hospitals, or other places where you don’t want the reminder to sound, simply turn on the “Mute All Alerts” switch to silence all reminders.

    Automatic Unmute After Specified Time 👑

    Set a timer (e.g., unmute after 2 hours) to prevent forgetting to turn the sound back on.

    Quickly Set Reminders

    The app is packed with features for rapid reminder setup.

    Voice Input for Titles and Memos

    Titles and memos can be entered using voice-to-text.

    Automatic Dictionary Registration for Frequent Titles

    Frequently used titles are automatically registered in a dictionary, allowing you to set them by simply selecting them.

    Time Plus/Minus Buttons

    Fine-tune the time quickly with +1 minute and +5 minute buttons.

    Frequently Used Time Buttons

    Register up to two frequently used times as buttons for instant setting.

    Date Plus/Minus Buttons 👑

    Easily advance the date by +1 day with a single button.

    Quick Set

    Register common patterns (Title, Time, Snooze, etc.) to set reminders instantly.

    Copy Feature

    Duplicate other reminders to set them up quickly.

    Shortcuts to Setup Screen 👑

    Place shortcuts on your home screen to jump directly to the reminder setup screen.

    AM/PM Indicator Icon

    To prevent accidental mistakes between 7:00 AM and 7:00 PM when using the 12-hour format, an icon indicating morning or night appears during setup for at-a-glance verification.

    Automatic Time Zone and Daylight Saving Adjustment

    For those who travel or stay abroad, the reminder time automatically compensates for time zone differences and alerts you at the local time. It also adjusts automatically for Daylight Saving Time to ensure you are notified correctly.

    Automatic/Manual Backup

    Manual and automatic backups are available to your device’s download folder or Google Drive. Setting up periodic backups to Google Drive provides peace of mind for device upgrades or unexpected data loss.

    Complete or Snooze from Lock Screen Notifications

    Conveniently snooze, stop, or check off tasks directly from lock screen notifications without opening the app.

    Resizable List Widget 👑

    Place the reminder list on your home screen. It can be resized down to 2×1 to fit in small spaces. You can also choose which tasks to display.

    Color Categories 👑

    Select from 7 colors for title and memo text. By assigning colors (e.g., pink for birthdays), you can categorize your tasks. Use the search function to filter by color, making list management easy.

    Hide Specific Tasks from the List

    Tasks you do not want to see in the main list can be hidden using color categories.

    Public Holiday Reminders 👑

    • Retrieve a list of public holidays and get alerts like “Tomorrow: Sports Day.”
    • “Holiday Skip” functionality allows you to silence specific reminders on public holidays.

     

    Dark Mode 👑

    A dark mode display option is available to be gentle on your eyes.

    🙆 Safe from Sudden Ad Audio

    Have you ever been startled by a video ad playing at high volume while using an app in a hospital waiting room, train, or office? In this app, video ads never start unless you are playing a game within the game page. We clearly warn users that sound may play during gameplay, so you can lower the volume in advance. Since there are no audio-playing ads outside of games, you can check your list and manage your schedule comfortably and safely in any location or situation.

    Disclaimer

    This app is intended for general schedule management and medication support and is not a substitute for medical practice. When using it for health management, always prioritize the instructions of medical professionals. The developer shall not be held liable for any damages resulting from the use of this application.

    Reminder FLEX FAQ