Sumire (スミレ) — The Privacy-First Japanese Keyboard
Reclaim Your Digital Privacy with Every Keystroke
• Experience the true freedom of typing without compromise.
• Sumire is a modern, completely offline Japanese keyboard engineered to keep your thoughts, conversations, and data right where they belong: exclusively on your device.
Absolute Privacy and Peace of Mind
• 100% Offline Security: Processes all input locally without sending a single byte of data to external servers.
• Zero Tracking, Zero Ads: Delivers a completely clean, distraction-free experience with no subscriptions, ads, or tracking scripts.
• Protected Personal Data: Keeps your custom dictionaries and typing habits safely stored on your device, making it ideal for confidential notes and sensitive business files.
Engineered for Unmatched Speed and Reliability
• Instant Responsiveness: Built with a low-latency input engine that reacts immediately to every tap and flick.
• Lightweight and Energy-Efficient: Switches fast, runs smoothly even on low-spec Android devices, and minimizes battery usage.
• Uninterrupted Typing Anywhere: Operates effortlessly in low-signal or offline environments, such as subways, airplanes, and remote outdoor locations.
Intelligent, Intuitive Design
• Smart Predictive Text: Features contextual suggestions that adapt to your personal style, covering everyday slang, standard Japanese, and professional terminology.
• Versatile Input Methods: Provides fluid one-handed flick input as well as a familiar QWERTY layout for comfortable two-handed typing.
• Sleek Monochrome Aesthetic: Utilizes a minimalist black-and-white layout designed for high visibility and reduced eye strain in any lighting.
Empowering Every Type of User
• Business Professionals: Confidently compose internal emails and handle client data with complete security compliance.
• Travelers and Commuters: Write notes, drafts, and messages anywhere in the world without relying on cellular connection.
• Privacy Advocates: Take back control over your digital footprint with an app that respects your autonomy.
Take command of your personal data today
• Download Sumire to experience Japanese typing that is swift, secure, and beautifully private.
FAQ
Q: Does Sumire require an active internet connection to work properly?
A: Not at all! Sumire operates completely offline without sending a single byte of data over the internet. You can enjoy uninterrupted typing wherever you go, including subways, airplanes, or remote locations with poor cellular signal.
Q: Are there any ads, subscriptions, or hidden tracking scripts in Sumire?
A: Sumire offers a clean and distraction-free experience with zero ads, zero tracking scripts, and no recurring subscription fees. Your personal typing data and privacy remain entirely under your control.
Q: Which typing input methods are available in Sumire?
A: Sumire supports versatile input options to match your typing preferences. You can easily use fluid 12-key flick input for quick one-handed typing or switch to a standard QWERTY layout for comfortable two-handed typing.
Version History
v1.7.106——11 Aug 2026
"Sumire" is a privacy-oriented Japanese keyboard app that is completely offline compatible. Provides simple and intuitive operation and high-speed input. Download the latest version of スミレ - 完全オフラインの日本語キーボードアプリ to enjoy new features and updates immediately!
*1.7.106
- キーボード復帰後などに全候補表示ボタンが正しく表示されない場合がある問題を修正
- 通常変換でも読みが完全一致する記号・絵文字・顔文字候補を保持するよう変更
- 従来まとめて扱っていた記号・絵文字・顔文字候補の設定を分離し、それぞれ個別にON/OFFできるようにしました
*1.7.105
- アプリが固まるバグの修正の試みました
*1.7.102
- Gemma がロードされている際の手書きキーボードの追加
- フリックの改善と設定の追加
- QWERTY の2本指の改善
- かな、 Sumire の日本語、英語、数字モードのキーにガイドの設定の追加
- 3段階層フリックをすべてgenerator経由で生成 by tetta-pdnt さん
