Ludwig by @LudwigGuru

Ludwig is the a sentence search engine that helps you write better English and feel more confident about it by giving you contextualized examples taken from reliable sources. 

On Google Play:

https://play.google.com/store/apps/details?id=com.ludwig.ludwig&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1 

On YouTube:

https://www.youtube.com/channel/UC0WwUD27J1NxEVopX0Ijo3g

Webpage:

https://ludwig.guru/