Apps by Ryouhei Azuma
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Simple Negative Image
Photo & Video
4.46
(109)
Free
Released Nov 2022
· updated Jul 2026
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Referee Yellow card, Whistle
Utilities
4.73
(48)
Free
Released May 2023
· updated Jul 2026
-
Simple Drawing Pad
Graphics & Design
3.94
(35)
Free
Released Dec 2021
· updated Jul 2026
-
Flash Mental Math - Simple
Education
4.68
(19)
Free
Released Jan 2021
· updated Jul 2026
-
Blackboard - Simple
Graphics & Design
4.50
(14)
Free
Released Dec 2021
· updated Jul 2026
-
Whiteboard - Simple
Graphics & Design
3.33
(12)
Free
Released Dec 2021
· updated Jul 2026
-
Thermography Camera
Photo & Video
4.00
(9)
Free
IAP?
Released Jun 2024
· updated Jul 2026
-
Negative Image Camera
Photo & Video
5.00
(7)
Free
Released Jul 2024
· updated Jul 2026
-
Simple Black and White Photo
Photo & Video
3.50
(6)
Free
Released Jan 2023
· updated Jul 2026
-
Big Timer - Simple
Utilities
2.60
(5)
Free
Released Apr 2022
· updated Jul 2026
-
Large Text Display - LED
Utilities
5.00
(4)
Free
Released Mar 2025
· updated Jul 2026
-
Drawing Pad - Blackboard style
Entertainment
3.75
(4)
Free
Released Dec 2021
· updated Jul 2026
-
Simple Vibrator
Health & Fitness
3.75
(4)
Free
Released Feb 2022
· updated Jul 2026
-
Simple Sepia Photo
Photo & Video
5.00
(3)
Free
IAP?
Released Feb 2025
· updated Jul 2026
-
Quiz Sound Effect
Entertainment
3.67
(3)
Free
Released Dec 2021
· updated Jul 2026
-
Simple Reverse Voice
Entertainment
5.00
(3)
Free
Released Nov 2022
· updated Jul 2026
-
Draw on Pictures - Simple
Utilities
3.67
(3)
Free
IAP?
Released May 2022
· updated Jul 2026
-
Scoreboard - Simple
Sports
3.50
(2)
Free
Released Jun 2023
· updated Jul 2026
-
Posterize Effects Photo
Photo & Video
4.50
(2)
Free
Released Oct 2025
· updated Jul 2026
-
Simple Voice Recorder Chan
Utilities
4.50
(2)
Free
Released Jan 2023
· updated Jul 2026
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Cartoon Sound Effects - Simple
Entertainment
3.00
(2)
Free
Released May 2023
· updated Jul 2026
-
Drawing Online
Graphics & Design
5.00
(2)
Free
Released Dec 2022
· updated Jul 2026
-
Thermography Photo
Photo & Video
5.00
(2)
Free
Released Jun 2024
· updated Jul 2026
-
Chemical Elements Learning
Education
3.00
(2)
Free
Released Feb 2023
· updated Jul 2026
-
Image Blend - Photo Overlay
Photo & Video
5.00
(1)
Free
Released Feb 2026
· updated Jul 2026
-
Simple Black And White Camera
Photo & Video
5.00
(1)
Free
IAP?
Released Jul 2024
· updated Jul 2026
-
HandwrittenNote Chan
Utilities
4.00
(1)
Free
Released Jan 2023
· updated Jul 2026
-
Simple Handwritten Note
Graphics & Design
5.00
(1)
Free
Released Dec 2022
· updated Jul 2026
-
Photo Contrast Adjustment
Photo & Video
5.00
(1)
Free
Released Jun 2023
· updated Jul 2026
-
X-ray Style Photo
Photo & Video
5.00
(1)
Free
IAP?
Released Dec 2025
· updated Jul 2026
-
Simple Video Cutter
Photo & Video
5.00
(1)
Free
Released Jan 2023
· updated Jul 2026
-
Simplify Fractions - Simple
Education
5.00
(1)
Free
Released May 2023
· updated Jul 2026
-
Horror Sound Effects
Entertainment
5.00
(1)
Free
Released Jun 2023
· updated Jul 2026
-
Online Quiz Buzzer
Entertainment
5.00
(1)
Free
Released Feb 2022
· updated Jul 2026
-
X-ray Style Camera
Photo & Video
1.00
(1)
Free
Released Dec 2025
· updated Jul 2026
-
Night vision style camera
Photo & Video
5.00
(1)
Free
Released Aug 2025
· updated Jul 2026
-
Simple Mosaic Camera
Photo & Video
Free
Released Feb 2025
· updated Jul 2026
-
Internal Admin Exam Prep JP
Business
Free
Released Apr 2026
· updated Jul 2026
-
Ghost Leg - Simple
Entertainment
Free
Released Mar 2022
· updated Jul 2026
-
Fire Equipment G2 Exam Prep JP
Business
Free
Released Apr 2026
· updated Jul 2026
-
QC検定® Semi-1 Exam Prep JP
Business
Free
IAP?
Released Mar 2026
· updated Jul 2026
-
Refrigeration G3 Exam Prep JP
Business
Free
Released Jun 2026
· updated Jul 2026
-
Transport Manager Passenger JP
Business
Free
IAP?
Released Mar 2026
· updated Jul 2026
-
VHS Photo - Retro Filter
Photo & Video
Free
IAP?
Released Dec 2025
· updated Jul 2026
-
QC検定® Grade 3 Exam Prep JP
Business
Free
Released Mar 2026
· updated Jul 2026
-
Fire Equipment G4 Exam Prep JP
Business
Free
IAP?
Released Apr 2026
· updated Jul 2026
-
Veterinary Nurse Exam Prep JP
Business
Free
Released Jun 2026
· updated Jul 2026
-
Surveillance Photo Editor
Photo & Video
Free
Released Jan 2026
· updated Jul 2026
-
Timestamp Camera: Photo Stamp
Photo & Video
Free
IAP?
Released Aug 2026
· updated Aug 2026
-
Securities Rep G2 Exam JP
Business
Free
Released Mar 2026
· updated Jul 2026
-
Life Insurance Exam Prep JP
Business
Free
Released Feb 2026
· updated Jul 2026
-
Typewriter Video Creation
Entertainment
Free
IAP?
Released Mar 2025
· updated Jul 2026
-
Electrician Exam Prep JP
Business
Free
IAP?
Released Mar 2026
· updated Jul 2026
-
Fire Equip A1 Exam Prep JP
Business
Free
IAP?
Released Apr 2026
· updated Jul 2026
-
Confectionery Hygiene Exam JP
Business
Free
IAP?
Released Apr 2026
· updated Jul 2026
-
Business Manager Exam JP
Business
Free
Released May 2026
· updated Jul 2026
-
Pencil Sketch Image
Photo & Video
Free
Released Feb 2023
· updated Jul 2026
-
Multi - Scoreboard
Utilities
Free
Released Jul 2023
· updated Jul 2026
-
Blur Photo - Simple
Photo & Video
Free
Released Feb 2025
· updated Jul 2026
-
Line Art - line drawing
Photo & Video
Free
Released Mar 2023
· updated Jul 2026
-
Reaction Time Test - RTT
Games
Free
Released Feb 2023
· updated Jul 2026
-
Simple Voice Changer Chan
Entertainment
Free
Released Jan 2023
· updated Jul 2026
-
Various Ringtones
Entertainment
Free
Released Dec 2021
· updated Jul 2026
-
Simple Fireworks
Entertainment
Free
Released May 2023
· updated Jul 2026
-
Remote Vibration
Health & Fitness
Free
Released Feb 2022
· updated Jul 2026
-
Photo Color Filter
Photo & Video
Free
Released Jul 2024
· updated Jul 2026
-
Blur Camera
Photo & Video
Free
Released Feb 2025
· updated Jul 2026
-
Dual Camera - Front & Back
Photo & Video
Free
Released Jun 2026
· updated Jul 2026
-
VHS Cam - Retro Video Filter
Photo & Video
Free
Released Dec 2025
· updated Jul 2026
-
Table Tennis Scoreboard Chan
Sports
Free
Released Aug 2023
· updated Jul 2026
-
Watercolor Photo Processing
Photo & Video
Free
Released Feb 2023
· updated Jul 2026
-
Fire Equipment G7 Exam Prep JP
Business
Free
IAP?
Released Apr 2026
· updated Jul 2026
-
Fire Equipment G5 Exam Prep JP
Business
Free
Released Apr 2026
· updated Jul 2026
-
Partial Color Photo
Photo & Video
Free
Released Oct 2025
· updated Jul 2026
-
Fire Equip A4 Exam Prep JP
Business
Free
Released Apr 2026
· updated Jul 2026