# お手軽暗号文章 広告つき > A hiragana-based encryption and decryption app. Enjoy combining five different types of encryption. Features AdMob ads. Canonical page: [https://chrome-stats.com/d/io.github.ttool.himitsu.free](https://chrome-stats.com/d/io.github.ttool.himitsu.free) ## Overview - **ID:** `io.github.ttool.himitsu.free` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** t\_tool - **Category:** TOOLS - **Downloads:** 1 - **Last updated:** 2026-08-26 - **First published:** 2026-08-26 - **Publisher country:** JP - **Data as of:** 2026-09-25 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=io.github.ttool.himitsu.free) - **Website:** [https://mrzak0304.github.io/himitsu-site/](https://mrzak0304.github.io/himitsu-site/) - **Privacy policy:** [https://mrzak0304.github.io/himitsu-site/privacy.html](https://mrzak0304.github.io/himitsu-site/privacy.html) ## Description This is a "playable cipher" app using hiragana. Its official name is "Easy Cipher Messages (Secret Communication)".

Here's what you can do:
- Register a cipher code and send secret messages that only others can understand!
- Create countless patterns of cipher messages using 5 different cipher methods and sequence manipulations.
- You can even send images in fragments. Share memories only with those who know the code.

Main Features:
- Freely combine 5 ciphers: Tanuki cipher (character insertion), consonant conversion, Enigma dial, reverse reading, and rotation. You can also decide the application order, creating infinite variations even with the same sentence.
- Encrypt katakana and alphabet: Encrypt and decrypt not only hiragana but also mixed katakana and English text (excluding some ciphers).
- Image cipher: Turn photos into mosaic art. Completely conceals the cipher using tile division and shuffling.
- Quiz-like element: The generated key is in a simple format like "1237 and 23 3123 4 55". The key itself can be used as the answer to a quiz.
- Save conditions: Save frequently used cipher combinations with names and recall them at any time (up to 5 saved).
- Save decryption keys: Save frequently used decryption keys for specific individuals with names (up to 5 saved).
- History management: Save up to 50 created ciphertexts and mosaic images to your device.
- Complete privacy: All processing is completed within the device. Input text and images are never sent externally.
- Offline operation: Usable without an internet connection (Kanji to Hiragana conversion is optional).

Target audience: Those who enjoy solving puzzles and those who want to exchange secrets with friends (late teens and up).

Note:
- The ciphers in this app are for fun and learning purposes only. Do not use this for protecting confidential information.
- This ad-supported version displays AdMob ads (banner ads and full-screen ads during encryption creation).
- You can save up to 5 conditions and 5 decryption keys. The ad-free paid version allows unlimited saving.
- For the ad-free, full-featured version, please purchase the paid version (300 yen). ## Rankings - #3,208,662 — Overall ## Similar extensions and apps - [お手軽暗号文章](https://chrome-stats.com/d/io.github.ttool.himitsu) — 1 users - [暗号文 簡易暗号作成ツール](https://chrome-stats.com/d/com.companyname.memocode) — 50 users - [nazoCode](https://chrome-stats.com/d/com.jp.studioguu.nazocode) — 2 users - [Cipher Jet Calm Cool](https://chrome-stats.com/d/com.cipher.jet.calm.cool) - [Cipherd](https://chrome-stats.com/d/com.apxdgtl.cipherd) — 25 users - [Cipher Orbit Rise Beige](https://chrome-stats.com/d/com.cipher.orbit.rise.beige) - [CryptoText: Text Encryptor](https://chrome-stats.com/d/com.realbonds.cryptotext) — 91 users - [TileCipher](https://chrome-stats.com/d/com.qxmvnbkrwzhfdpgtjylc.tilepwk) — 1 users - [Cipher Sienna Dog Idle](https://chrome-stats.com/d/com.chefly.flavor.flavor_fusion_fire) — 9 users - [Caesar Cipher - Easy Encrypt a](https://chrome-stats.com/d/com.burhangok.caesarcipher) — 227 users - [Cipher Pluck Ignite Craft](https://chrome-stats.com/d/com.cipher.pluck.ignite.craft) — 1 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/io.github.ttool.himitsu.free)