I have a app called SMS secret. It encrypts the text. Both sender and recipient have to have the app.
You send the message in the app the recipient get the text in the Apple messages app but it's encrypted.
When they tap on the encrypted text it opens SMS Secret App which is password protected by drawing a pattern. Once the app is open you can read the text.
It's cool I guess for texting sensitive material. If a person can unlock your phone the can see that a encrypted text was received or sent but they can't open the SMS Secret App without the pattern password.
It was free when I got it a few days ago on sale.
SMS Secret For iOS 8 by Hai Dao Ngoc
https://appsto.re/us/dVqw2.i
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