diff --git a/Competing-Apps.md b/Competing-Apps.md
index 3004f05..8beaa85 100644
--- a/Competing-Apps.md
+++ b/Competing-Apps.md
@@ -9,18 +9,18 @@ Just a collection of competitive apps.
 | [PGP KeyRing](https://play.google.com/store/apps/details?id=com.imaeses.keyring) | closed | yes |
 
 ## Mail Apps with OpenPGP support
-| Name | License |
-|----  | -----   |
-| [Squeaky Mail](https://play.google.com/store/apps/details?id=com.imaeses.squeaky) (for PGP KeyRing) | Apache v2, [Github](https://github.com/imaeses/k-9) |
-| [R2Mail2](https://play.google.com/store/apps/details?id=at.rundquadrat.android.r2mail2) | closed |
-| [PGP Mail](https://play.google.com/store/apps/details?id=com.pgp.mail) | closed |
-| [Secure Email](https://play.google.com/store/apps/details?id=com.edatech.secureemail) | closed |
-| [Maildroid](https://play.google.com/store/apps/details?id=com.maildroid) | closed |
-| [SMail - Secure Email](https://play.google.com/store/apps/details?id=com.gimy.smail) | closed |
-| [Trustera](https://play.google.com/store/apps/details?id=com.trusteracorp.androidmail) | closed |
-| [PEP Android app](http://pep-project.org)  | GPL |
-| https://protonmail.ch/ | ? |
-| [EmailSecure](https://play.google.com/store/apps/details?id=com.safetyjabber.emailsecure) | ? |
+| Name | License | Tech |
+|----  | -----   |-----   |
+| [Squeaky Mail](https://play.google.com/store/apps/details?id=com.imaeses.squeaky) (for PGP KeyRing) | Apache v2, [Github](https://github.com/imaeses/k-9) |? |
+| [R2Mail2](https://play.google.com/store/apps/details?id=at.rundquadrat.android.r2mail2) | closed |? |
+| [PGP Mail](https://play.google.com/store/apps/details?id=com.pgp.mail) | closed |? |
+| [Secure Email](https://play.google.com/store/apps/details?id=com.edatech.secureemail) | closed |? |
+| [Maildroid](https://play.google.com/store/apps/details?id=com.maildroid) | closed |? |
+| [SMail - Secure Email](https://play.google.com/store/apps/details?id=com.gimy.smail) | closed |? |
+| [Trustera](https://play.google.com/store/apps/details?id=com.trusteracorp.androidmail) | closed |? |
+| [PEP Android app](http://pep-project.org)  | GPL | C-code, based on K-9 |
+| https://protonmail.ch/ | MIT? [GitHub](https://github.com/ProtonMail/WebClient) | OpenPGP.js |
+| [EmailSecure](https://play.google.com/store/apps/details?id=com.safetyjabber.emailsecure) | ? | ? |
 
 
 ## Other end-to-end email encryption tools (NOT OpenPGP compatible)