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This application is currently in testing, and you may encounter bugs or other issues. If you experience any problems, please report them to the developer.
This application does not contain any malicious code, so you can use it with confidence.
Donations are always welcome. If you find this app useful, feel free to treat me to a Cinnabon. A Whopper is fine too.
Subscreen Tool is an application designed exclusively for the Unihertz Titan 2.
It uses the rear display to provide the following features:
Image slideshows
Clock display
Notification display with flash alerts
Currently playing media information
Calendar Display [New]
Timer [New]
After installing the APK file, you must grant the required permissions.
These permissions are necessary for notification display, notification flash alerts, and image selection.
Launch the application on the front display. The initial setup menu will appear.
Follow Steps 1 through 7 to grant the required permissions.
During Step 1, you may see a message stating that the setting cannot be changed. You can ignore this message and continue to Step 2.
After completing all the steps, close the application on the front display.
If you accidentally close the initial setup menu before completing the process, simply launch the application again on the front display. The setup menu can be opened at any time this way.
For normal use, launch the application from the rear display.
Setup is now complete.
This application is designed to run on the rear display, also referred to as the subscreen.
Always launch the application from the rear display.
Due to limitations of the device, the following system gestures cannot be disabled:
Swipe up to return to the Home screen
Swipe left to return to the application list
Please take care not to activate these gestures accidentally.
To prevent accidental operation while walking or carrying the device, the Settings menu must be opened using the following procedure:
Double-tap the screen.
Tap all three green circles before the time limit expires. They may be tapped in any order.
The Settings menu will appear.
Tap the ◀ icon at the top of the screen to return to the previous menu level.
Notification flashes are disabled while the Settings menu is open. However, the flash may still activate for other reasons, such as alarms or incoming calls. As a safety precaution, cover the flash area with thick paper or another opaque material while changing settings.
Tap a setting to change its value.
Image
Configures the image slideshow.
Clock
Configures the clock display.
Media
Configures the display of currently playing music and other media.
Notification
Configures notification display and notification flash settings.
Gadget [New]
Configures gadget-related settings.
System
Provides system-related settings and operations.
Set Number
Shows the number of the settings set that is currently active.
Shows the number of images currently selected for the slideshow.
Tap this item to select or deselect images.
Tap Clear All in the bottom-right corner to deselect all currently selected images.
Sets the number of seconds for which each image is displayed during the slideshow.
Sets the order in which images are displayed.
Sequential: Displays images in numerical order.
Random: Displays images in a random order.
Sets how images are fitted to the display.
Fill: Enlarges the image to fill as much of the screen as possible.
Width: Fits the width of the image to the width of the screen.
Height: Fits the height of the image to the height of the screen.
Sets the transition effect used when changing slideshow images.
Slide Up: The next image slides upward from the bottom.
Drop: The next image drops down from the top.
Crossfade: The current image gradually fades into the next image.
None: The image changes immediately without an animation.
Sets the clock display layout.
Type 1: Time only
Type 2: Full weekday name and time
Type 3: Abbreviated weekday, date, and time
Example: MON 20 followed by the time
Type 4: Full weekday name and date, without the time
Type 5: Alternates between the full weekday with the time and the date
Type 6: Month/day, abbreviated weekday, and time
Example: 07 / 20 MON followed by the time
Type 7: Short date format based on the device’s language and region, followed by the weekday and time
In Japanese and Korean, the weekday is enclosed in half-width parentheses.
Example in Japanese: 7/20 (月)
Sets whether the time is displayed in 24-hour or 12-hour format.
Sets how frequently the clock display is updated.
For normal use, an interval of 30 seconds or 60 seconds is recommended. More frequent updates will increase battery consumption.
The notification flash described later also flashes at this interval.
Use the upper slider to adjust the vertical position of the first line of text.
Use the lower slider to adjust the intensity of the shadow behind the clock text.
Sets the color of the shadow behind the clock text.
Configures the appearance of the hour digits.
Font: Font used for the hour digits
Size: Font size
Hour Color: Color of the hour digits
Separate colors may be used for AM and PM.
Configures the appearance of the minute digits.
Font: Font used for the minute digits
Size: Font size
Minute Color: Color of the minute digits
Configures the appearance of the weekday text.
Font: Font used for the weekday
Size: Font size
Weekday Color: Color of the weekday text
Configures the appearance of the date when the date is displayed on its own.
Font: Font used for the date
Size: Font size
Date Color: Color of the date text
Configures the appearance of the first line when it contains a combination of the weekday, month, and date.
Font: Font used for the weekday and date
Size: Font size
Weekday & Date Color: Color of the weekday and date text
Configures the appearance of the AM/PM indicator when using the 12-hour time format.
Display: Shows or hides the AM/PM indicator
Font: Font used for the AM/PM indicator
Size: Size of the AM/PM indicator relative to the minute font size
AM Color / PM Color: Text colors used for AM and PM
When this setting is On, information about currently playing media, such as music or radio, is displayed on the screen.
Sets how track information is displayed.
Standard: Displays track information in the upper-left corner of the artwork.
Fun: Displays the track information on a separate information panel.
Available only when Title Style is set to Fun.
Sets the animation used when the track information panel appears.
Rise: The panel rises from the bottom.
Drop: The panel drops down from the top.
Crossfade: The panel appears using a crossfade effect.
Available only when Title Style is set to Fun.
Sets the background color of the track information panel.
Available only when Title Style is set to Fun.
Sets the text color of the track information panel.
Sets how long the track title is displayed after the track changes.
Select Always to keep the track title visible at all times.
This item is used by the system.
It shows whether the application has permission to access media information.
This section configures the notification display and notification flash.
Sets how notifications are shown on the screen.
Banner: Displays notifications as a colored banner.
Sticky Notes: Displays notifications as sticky notes.
A colored strip appears on the screen to indicate that a notification has been received.
4.7.1.1.1 Height
Sets the height of the notification banner.
4.7.1.1.2 Marker Color
Sets the color of the notification banner.
4.7.1.1.3 Position
Sets where and how the notification banner is displayed.
Up: Displays the banner from the top edge of the screen.
Left: Displays a triangular marker in the left corner.
Right: Displays a triangular marker in the right corner.
When a notification is received, one sticky note is added for each notification.
4.7.1.2.1 Style
Sets the appearance of the sticky notes.
Macaron: Uses pale colors.
Vivid: Uses strong, vivid colors.
Accent: Uses white notes with a strong accent color along one edge.
4.7.1.2.2 Orientation
Sets where the sticky notes are displayed.
Vertical: Displays the notes along the top of the screen.
Horizontal: Displays the notes along the right side of the screen.
4.7.1.2.3 Icon
Sets whether an icon is displayed when icon information is available for the notification.
On: Shows the icon.
Off: Hides the icon.
4.7.1.2.4 Text
Sets whether notification text is displayed.
On: Shows notification text.
Off: Hides notification text.
4.7.1.2.5 Text Source
Available only when Text is set to On.
Sets which information is displayed on the sticky note.
Content: Displays the notification content.
Sender: Displays the sender’s name when it can be obtained.
4.7.1.2.6 Font
Available only when Text is set to On.
Sets the font used for sticky-note text.
4.7.1.2.7 Font Size
Available only when Text is set to On.
Sets the size of the sticky-note text.
4.7.1.2.8 Size
Sets the length of the sticky notes.
4.7.1.2.9 Notes
Sets the maximum number of notification notes displayed on the screen.
Notifications that do not fit on the screen will not be displayed.
When this setting is On, silent notifications are excluded from the notification display.
When this setting is On, the notification flash activates whenever the clock display is updated.
Sets how long the notification flash remains lit, in milliseconds.
Sets the brightness of the flash.
This feature is not supported by the Titan 2.
This item is used by the system.
It shows the current status of the application’s notification access permission.
This section contains system-related settings and operations.
When this setting is On, the device is locked when it is placed on a desk with the rear display facing upward.
This item is used by the system.
It shows the current status of the required Accessibility permission.
Opens the setup guide, from which you can configure the required permissions.
Saves the current application settings to a file on the device.
Restores application settings from a previously saved file.
Closes the application.
After the application has been closed, the notification flash will no longer activate.
Change the orientation of the device to use the following gadgets:
Tilt the device to the left: Displays the calendar.
Turn the device upside down: Starts the timer.
Displays the calendar for the current month.
Swipe left or right to display the previous or next month.
Enables or disables the calendar feature.
Sets the background color of the calendar.
Sets the font used for the year and month.
Sets the text size of the year and month.
Sets the text color of the year and month.
Sets the font used for the weekday labels.
Sets the text size of the weekday labels.
Sets the text color of the weekday labels.
Sets the font used for the date numbers.
Sets the size of the date numbers.
Sets the color of date numbers that fall on weekdays.
Sets the color of date numbers that fall on Sundays.
Sets the color of date numbers that fall on public holidays.
Sets the color of the circle used to highlight today’s date.
Sets the first day of the week.
Selects the holiday calendar registered in Google Calendar that will be used to identify public holidays.
Resets all calendar settings to their default values.
Turn the device upside down to use the timer.
A notification is sent when the selected amount of time has elapsed.
Sets the timer duration.
Select Off to prevent the timer from starting when the device is turned upside down.
Sets the visual style of the timer.
Bars: Bars fall down the screen.
Liquid: Liquid flows down the screen.
Soda: The soda level decreases as though it is being consumed.
Available only when Timer Style is set to Liquid.
Sets the viscosity of the liquid.
Light: Water-like
Normal: Standard viscosity
Thick: Oil-like
Available only when Timer Style is set to Soda.
Sets the amount of carbonation in the soda.
Light: Lightly carbonated
Normal: Normally carbonated
Strong: Highly carbonated
Sets how frequently the remaining timer duration is updated.
For normal use, an interval of 10 seconds is recommended. If a shorter interval is selected, the device may not be able to process the animation quickly enough.
Sets the timer color used for each display style.
Sets the transparency of the timer display.
0%: Completely opaque
100%: Completely transparent
Sets the speed at which the timer animation falls or flows down the screen.
When this setting is On, a sound plays when the timer reaches zero.
When this setting is On, the device vibrates when the timer reaches zero.
This application can store up to five separate sets of display settings.
Tap the Set number to switch quickly between Set 1 and Set 5.
Double-tap the Set number to copy the current settings to another Set.
This is useful when you want to create another Set with mostly the same settings and make only minor adjustments.
Double-tap the current Set number.
Select the destination Set number.
Tap Copy.
The settings will be copied to the selected Set.
When notifications are displayed as sticky notes, tap a sticky note to view the complete notification details.
Tap Back to return without removing the notification.
Tap Clear to clear the notification.
When the front side of the device, where the keyboard is located, is facing upward, the rear display turns off.
When the rear side of the device is facing upward, the device is locked if Rear-Up Lock is enabled.
[New] As it was confirmed that the subscreen uses an LCD panel, the screen burn-in prevention feature has been removed.
This application has been designed to operate correctly according to its specifications. However, correct operation under all conditions is not guaranteed.
The developer assumes no responsibility for any loss, damage, or other consequences resulting from the use of this application.
This application is not affiliated with or endorsed by Unihertz. Please do not contact the device manufacturer regarding this application.
For questions, bug reports, or other inquiries, please use the contact information below.
As this is an independently developed application, please understand that responses may take some time.
Email: suzusuzunomiya@gmail.com
X: @SuzuLivedHere
v 0.9.3 July 22, 2026
