Text Encryption
Text encryption can be useful for different purposes. There's the "easy hiding" of spoilers (e.g. using Caesar-Chiffre aka "ROT-13", also used with Geo-Caching), or Morse-Codes. And there are more serious things like safe-guarding sensitive information with real encryption. For all this, you can find matching Android apps:
Caesar-Cipher
Caesar-Cipher is also known as "ROT" (from "rotate"), as the algorithm rotates the letters of the alphabet (e.g. 13 times with ROT-13), which is easily revertable. Caesar is said having used this to encrypt military correspondence, hence the name.
- Rot13 ↺ Edg13 (5@4) 0
LastUpdate: 2017-03-15
- CaesarCipher (5@1) 0
LastUpdate: 2019-10-22
- Caesar Cipher Disk (4.8@10) 1
LastUpdate: 2021-08-09
- Caesar cipher - De-/Encryption (4.7@9) 2
LastUpdate: 2020-04-15
- ROT13 (4.7@6) 0
LastUpdate: 2020-11-26
- ROT13 Translator (4.6@29) 0
LastUpdate: 2014-07-20
- Pijaret (0@0) 0
LastUpdate: 2016-09-27 Github
Morse Code
Morse code was used for telegraphy long ago. But it's still active in seafaring today (often as light signals), its best known example probably being the SOS distress signal.
Morse Tutors
- Morse Mania: Learn Morse Code (4.8@840) Ǥ 9
2
- Morse Trainer for Ham Radio (4.8@24; ~EUR 3.25) 3
LastUpdate: 2018-01-06
- G0HYN Learn Morse (4.5@8) 0
- Morse Mentor (4.3@23) Ǥ 5
2
- Morse code - learn and play (4@30) 6
2
LastUpdate: 2020-06-05 / Morse code - learn and play - (4.9@8; ~EUR 2.00) 3
LastUpdate: 2019-12-17
- Mors. : The Morse Code Trainer (3.3@15) 2
1
LastUpdate: 2020-06-15
- Morse Code Trainer & Learning (2.3@10) 3
1 LastUpdate: 2019-05-14
- Morse Audio - Morse Code Learn (1@42) Ǥ 3
1
LastUpdate: 2018-12-03
- Morse Trainer (0@0) 0
Github
General Morse apps
- Morse Translator - Morse Code (5@73) 7
2
LastUpdate: 2020-02-04
- Morse Code Translator (5@5) 4
1
- BF4 Lantern & Morse Solver (4.7@79) 5
1 LastUpdate: 2020-07-21
- Morse Torch (4.5@17) 2
LastUpdate: 2018-11-30
- TwitMorse -Tweet morse code!- (4.5@17) Ǥ 4
4
LastUpdate: 2020-10-21
- Scout: Morse Translator (4.5@15) Ǥ 6
2
- Morse Code (4.4@161) 7
1
LastUpdate: 2020-03-17
- Pocket Talk (4.3@6) 5
LastUpdate: 2016-01-13
- Morse (4.3@6) 2
Github
- M³ Translator: Morse code (4.2@5,302) Ǥ 9
3
LastUpdate: 2021-03-27
- morsee : Enjoy Morse code (4@5) Ǥ 7
4
- Morse Code Reader (3.9@102) 2
LastUpdate: 2013-08-27
- Morse Transmitter (3.8@1,093) 1
LastUpdate: 2014-01-20
- Morse (3.7@13) 5
2
LastUpdate: 2018-03-10
- Morse Code Translator (3.6@84) Ǥ 12
3
- Morse Me (3.5@87) Ǥ 9
4
LastUpdate: 2020-05-28
- Morse Code Translator (3.4@36) 4
3
LastUpdate: 2017-02-15
- Morse Decoder for Ham Radio (3.4@16; ~EUR 5.50) 6
LastUpdate: 2017-03-15
- SMS-Morse (1@20) 0
Morse Keyboards
- DotDash Keyboard (4.3@7) 1
LastUpdate: 2020-05-20 Github
- Morse Code Keyer (4@10) 5
1
LastUpdate: 2020-02-23
- MouseCode Keyboard (3.7@3) 1
LastUpdate: 2017-03-01
- Morse Code Keyboard (3@141) Ǥ 5
3
LastUpdate: 2018-12-08
Multiple text-encryption methods
- Cipher tools (4.6@843) 1
LastUpdate: 2012-05-09 vigenere, mobile cipher, morse code, ascii code, binary code, oct code, hex code, base64 code, digital sum, reverse words or text, ROT cipher, roman numbers, braille decoder, fake text, front to back text, mathias sandorf, playfair
- Coooder (4.6@5) Ǥ 5
4
LastUpdate: 2019-02-09
- Cipher Decoder Cipher Solver (4.5@8) Ǥ 7
4
LastUpdate: 2019-05-15
- Cryptography (4.4@101) Ǥ 8
2
- Decrypto (4.3@99) 4
1
LastUpdate: 2017-09-30 / DecryptoPro (4.6@18; ~EUR 1.75) 5
LastUpdate: 2017-09-30
- Cipher Solver (4.2@188) 0
LastUpdate: 2016-11-10 Caesar, Vigenère …
- Cipher Tool (4.2@20) 1
LastUpdate: 2020-08-06
- Universal Encoding Tool (4.2@13) 0
- ⭐Message/Text Encryptor - Secu (4@28) 3
1
LastUpdate: 2019-05-02
- Cryptography Mean™ - Encryptio (1@5) Ǥ 5
1
LastUpdate: 2018-07-24
Text encryption with PGP
- Latebra cryptographic app (4.6@8) Ǥ 21
4
LastUpdate: 2021-05-17 encrypt SMS/Email
- OpenKeychain: Easy PGP (4.3@640) Ǥ 13
Github; Video Howto 9/2016 (DE); Howto 12/2017 | 2/2019; Anleitung 8/2020 | 11/2020; Wikipedia DE | EN
- APG (4.2@13) 6
LastUpdate: 2014-04-04 Github; Description and Howto; Wikipedia (EN); Files + Mails
- PGPClipper (4.1@11) 3
LastUpdate: 2018-12-12 Github
- YAP! - Yet Another PGP Tool (4@8) 2
LastUpdate: 2021-02-17 Github
- Tessercube (1@30) 20
LastUpdate: 2020-07-25 Github
- OkcAgent (0@0; ~EUR 1.00) 3
LastUpdate: 2020-11-24 Github; make OpenKeychain available in your Termux shell
Encryption with AES/DES
- AES Message Encryptor for SMS (5@7) 0
LastUpdate: 2017-01-15
- Cryptool (4.7@14) 8
Github
- Private Notepad - safe notes (4.4@290) Ǥ 19
4
- SealNote (4.3@3,157) 2
LastUpdate: 2017-04-13 Github; Video Intro 4/2017
- SSE - File & Text Encryption (4.3@126) Ǥ 6
GitLab; Password-Safe, texts, files, and more; cross-platform (Windows, Linux, Mac OS X, …); Open Source
- Sec Notes- Secure Notepad (4.3@20) Ǥ 15
2
- Notepad with password (4.3@13) Ǥ 9
4
/ Notepad with password PRO (4.3@87; ~EUR 4.50) 2
LastUpdate: 2019-10-26
- CrocodileNote (3.5@16) 2
LastUpdate: 2015-03-13 Github; AES-256 encrypted notes
- SimpleTextCrypt (0@0) 0
LastUpdate: 2020-10-10 Github
- Encrypt Text (0@0) 0
LastUpdate: 2020-08-23 Github
- KeyCip (0@0) 7
Github
Various other encryption apps
- Cryptogram (4.8@76) 0
LastUpdate: 2012-05-31
- Latebra cryptographic app (4.6@8) Ǥ 21
4
LastUpdate: 2021-05-17 encrypt SMS/Email
- Crypto - Encryption Tools (4.5@202) Ǥ 12
3
- Enigma Simulator (4.4@154) Ǥ 6
1
- Enigma Trial - Cryptograms (4.3@182) 0
LastUpdate: 2017-12-09 / Enigma - Cryptograms (5@169; ~EUR 1.00) 0
LastUpdate: 2017-12-09
- Oversec (4.3@14) Ǥ 4
LastUpdate: 2019-04-23
- Safe Notes is a secure notepad (4.1@57) Ǥ 13
2
- PGPClipper (4.1@11) 3
LastUpdate: 2018-12-12 Github
- Cryptogram Puzzle Quotes Game (4@1,507) Ǥ 5
3
LastUpdate: 2020-04-26
- Kryptomat (3.9@11) 2
LastUpdate: 2021-01-02
- PixelKnot: Hidden Messages (3.3@59) 4
Github; Details; Steganography (text hidden inside image, unlock with passphrase)
- Encrypt Editor (1@35) 9
21
- Rivia (0@0) 0
Github
- EnigmAndroid (0@0) 0
LastUpdate: 2019-01-03 Github; Enigma Simulation
Further Readings:
- Category Encryption of Files and Folders
- Category Messenger & Conferences