Upside down keyboard

Installs

< 100

Rating

0.0

Rating count

< 100

Category	Productivity
Developer	星野淳志
Price	0.3
First release	7/10/2018 (7 years ago)
Version	4.0
In-app purchases	No
Contains ads	No
Content rating	All ages
Package name	com.fc2.web.etuc.keyboard29

View on Play Store

Core Metrics

Data Breakdown

Date	Installs	Version
9/13/2025	99	4.0
9/12/2025	99	4.0
7/14/2025	95	3.0
7/13/2025	94	3.0

Details

This is a soft keyboard for entering the alphabet upside down.
zʎxʍʌnʇsɹbdouɯ|ʞɾ!ɥɓɟəpɔqɐ
(The letter that looks upside down is entered instead.)
Part of uppercase letters will not be inverted.
It is a QWERTY array.

Please be aware that it may not be saved correctly depending on the character code of the text file to be entered.
If it is UTF-8 of the standard character code of Android OS it can be saved correctly.
There is a possibility of garbled characters when saving with the standard character code of Windows PC.



Enabling Keyboards

01
Go to Settings > System > Languages & input > and tap Virtual keyboard in the Keyboard & inputs section.

02
You'll see a list of each keyboard you've installed.
Tap "Manage keyboards".

03
Toggle on the new keyboard.
You might see a warning that this input method may collect the text you type including personal information.
But this app does not collect any input content.
This is not a warning specific to this application, it will always be displayed if you select a character input application other than the keyboard that is standard on the device.
If you're satisfied with the explanation, tap OK.


Note: Instructions will vary depending on your Android OS.



Switching Keyboards

01
Launch the app you want to type in.

02
Tap to bring up the keyboard.

03
Tap the keyboard icon on the bottom right.
(On some devices this icon isn't present, in that case pull down the notification bar when a keyboard is active.)

04
Choose the keyboard from the list that pops up.

More Apps by星野淳志

Whistle, Yellow & Red Card

Installs: 148,708Score: 3.77Ratings: 207

Price: N/A

Version: N/AReleased: 10/15/2019Last change: N/A

Wadaiko

Installs: 41,132Score: 4.00Ratings: 65

Price: N/A

Version: N/AReleased: 5/20/2019Last change: N/A

Tab keyboard

Installs: 4,159Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 3/23/2018Last change: N/A

Chemical equation keyboard A

Installs: 2,798Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 7/14/2018Last change: N/A

Chemical equation keyboard C

Installs: 2,096Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 7/30/2018Last change: N/A

Subscript numeric keypad

Installs: 2,041Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 4/20/2018Last change: N/A

More Apps inProductivity

Easy Notes - Note Taking Apps

Installs: 28,319,140Score: 4.35Ratings: 370,787

Price: N/A

Version: N/AReleased: 10/29/2020Last change: N/A

Family Shared Calendar: FamCal

Installs: 1,517,598Score: 3.99Ratings: 8,454

Price: N/A

Version: N/AReleased: 5/26/2016Last change: N/A

Note AI: Smart Note Taker

Installs: 304,966Score: 4.20Ratings: 5,989

Price: N/A

Version: N/AReleased: 2/28/2025Last change: N/A

QR Code Scanner Barcode Reader

Installs: 6,087,243Score: 4.22Ratings: 27,494

Price: N/A

Version: N/AReleased: 3/6/2019Last change: N/A

Habit Tracker - HabitKit

Installs: 526,115Score: 4.82Ratings: 8,808

Price: N/A

Version: N/AReleased: 11/25/2022Last change: N/A

Photo Scanner - Scan to PDF

Installs: 2,046,972Score: 4.33Ratings: 9,619

Price: N/A

Version: N/AReleased: 9/29/2021Last change: N/A

Countdown Widget・Countdown app

Installs: 11,717,393Score: 4.18Ratings: 116,180

Price: N/A

Version: N/AReleased: 3/24/2013Last change: N/A

Note AI: Voice AI Transcribe

Installs: 23,026Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 5/21/2025Last change: N/A

CleverType AI Keyboard

Installs: 2,467,673Score: 4.20Ratings: 27,594

Price: N/A

Version: N/AReleased: 4/14/2023Last change: N/A

Tasks: To Do List & Reminders

Installs: 5,965,578Score: 4.77Ratings: 131,882

Price: N/A

Version: N/AReleased: 11/20/2016Last change: N/A

AI Note Taker - Voice to Notes

Installs: 87,464Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 1/2/2025Last change: N/A

Smart Print - Air Printer App

Installs: 2,711,869Score: 4.43Ratings: 62,146

Price: N/A

Version: N/AReleased: 4/12/2022Last change: N/A

Site Audit Pro

Installs: 137,780Score: 3.62Ratings: 715

Price: N/A

Version: N/AReleased: 10/14/2014Last change: N/A

Chat AI: AI Chat Bot Assistant

Installs: 14,139,446Score: 4.66Ratings: 226,052

Price: N/A

Version: N/AReleased: 3/15/2023Last change: N/A

Super Planner: ADHD Routine AI

Installs: 50,187Score: 4.21Ratings: 691

Price: N/A

Version: N/AReleased: 1/13/2025Last change: N/A

DocHub: Edit, Sign & Share PDF

Installs: 102,416Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 1/10/2024Last change: N/A

Notes: Color Notepad, Notebook

Installs: 15,727,975Score: 4.10Ratings: 152,008

Price: N/A

Version: N/AReleased: 12/11/2022Last change: N/A

Weekly Planner - Agenda

Installs: 4,332,339Score: 4.63Ratings: 62,843

Price: N/A

Version: N/AReleased: 3/31/2021Last change: N/A

Docx Reader & Word Office

Installs: 1,192,529Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 5/26/2024Last change: N/A

Forest: Focus for Productivity

Installs: 42,609,768Score: 4.59Ratings: 786,293

Price: N/A

Version: N/AReleased: 8/25/2014Last change: N/A

Trend Micro Password Manager

Installs: 384,234Score: 4.34Ratings: 5,431

Price: N/A

Version: N/AReleased: 3/11/2012Last change: N/A

Private Notepad - safe notes

Installs: 3,529,088Score: 4.23Ratings: 49,602

Price: N/A

Version: N/AReleased: 7/22/2015Last change: N/A

Norton AntiTrack

Installs: 197,425Score: 3.35Ratings: 484

Price: N/A

Version: N/AReleased: 6/8/2023Last change: N/A

PDF Reader: PDF Viewer

Installs: 3,998,406Score: 4.54Ratings: 27,191

Price: N/A

Version: N/AReleased: 4/2/2024Last change: N/A

Minutes: AI Meeting Note Taker

Installs: 143,438Score: 3.90Ratings: 2,343

Price: N/A

Version: N/AReleased: 1/15/2025Last change: N/A

UpNote - notes, diary, journal

Installs: 349,082Score: 4.67Ratings: 14,499

Price: N/A

Version: N/AReleased: 4/12/2021Last change: N/A

Sexy Chatbot X - No Filter AI

Installs: 920,028Score: 4.47Ratings: 21,375

Price: N/A

Version: N/AReleased: 5/20/2023Last change: N/A

Degoo: 20 GB Cloud Storage

Installs: 29,214,506Score: 4.20Ratings: 935,538

Price: N/A

Version: N/AReleased: 8/17/2015Last change: N/A

PDFelement-PDF Editor & Reader

Installs: 6,103,158Score: 4.08Ratings: 29,868

Price: N/A

Version: N/AReleased: 9/27/2017Last change: N/A

MeisterTask - Task Management

Installs: 1,024,738Score: 4.60Ratings: 10,872

Price: N/A

Version: N/AReleased: 12/19/2016Last change: N/A

one sec | app blocker, focus

Installs: 1,383,606Score: 4.54Ratings: 33,071

Price: N/A

Version: N/AReleased: 1/9/2023Last change: N/A

Supershift - Shift Calendar

Installs: 1,429,440Score: 4.73Ratings: 22,728

Price: N/A

Version: N/AReleased: 10/7/2021Last change: N/A

Notta-Transcribe Audio to Text

Installs: 2,610,010Score: 3.61Ratings: 15,797

Price: N/A

Version: N/AReleased: 2/14/2020Last change: N/A

AI Writer: Chatbot Assistant

Installs: 919,613Score: 4.22Ratings: 14,517

Price: N/A

Version: N/AReleased: 3/16/2023Last change: N/A

Notepad, Notes, Easy Notebook

Installs: 22,943,107Score: 4.83Ratings: 378,864

Price: N/A

Version: N/AReleased: 4/8/2022Last change: N/A

CamCard AI Scanner, Transcribe

Installs: 12,967,601Score: 4.15Ratings: 152,249

Price: N/A

Version: N/AReleased: 3/2/2010Last change: N/A

Go back to the Home page