You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
If you guys are searching for a self hosted Logger, you should take a look at: bassmaster187/TeslaLogger
There are actually like 800 active installations in Germany and we translated it to English and Norwegian. If anybody wants to translate it in another language, feel free to contact me...