We are pleased to inform that the handbook app  «Ozone Treaties» developed by the UN Ozone Secretariat is already available in all six official UN languages. 
The application provides an instant access to the handbooks of the Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances that Deplete the Ozone Layer, including the decisions taken at the Meetings of the Parties(31st MOP including).

The app is available free of charge in the respective app stores, App Store and Google Play.