iOS App Developer
Making gratitude easier to express.
Bringing music to everyone.
I build iOS apps that make everyday life a little richer. All apps are free to download.
Create and share beautiful award certificates easily. Choose a template, enter text, and create professional-quality certificates in minutes.
Music player that amplifies volume up to 500% (5x) for earphones and headphones. Play hard-to-hear music and podcasts clearly.
Yes, all HoneyMarron apps including Award Certificate Maker and VoicyCare are completely free to download and use from the App Store. All core features are available at no cost. Some apps may display advertisements and offer optional paid features for enhanced functionality.
Award Certificate Maker and VoicyCare are available free on the App Store for iPhone and iPad running iOS 15.0 or later. oshitecho requires iOS 26.0 or later on iPhone and is preparing for App Store release (web: oshitecho.com). Expansion to Android and other platforms may be considered in the future.
Yes, privacy and data security are top priorities. Storage varies by app. Award Certificate Maker stores creations locally on your device; we do not access user content. VoicyCare focuses on on-device playback files. oshitecho stores event and participation data on servers for collaborative scheduling (see oshitecho.com/privacy). See each app's privacy policy for details. Site-wide policy: Privacy Policy.
You can reach us through our contact page or visit each app's official website for dedicated support. Whether you have product questions, need to report a bug, or want to suggest a new feature, we welcome all feedback. We respond in both Japanese and English as quickly as possible.