Bridgefy
An SDK that makes apps work offline- Use Online Apps Offline
Screenshots

Hunter's comment
Bridgefy keeps people connected when Internet is unavailable.
It can be used for a variety of apps. Ride hailing apps like Uber, messaging apps and also gaming apps.
Direct contact: Direct communication between devices, up to 330 feet.
Mesh networking: Messages can be delivered over larger distances through intermediary devices.
Broadcast: Messages spread out to all nearby users.
The bridgefy SDK works for both Andriod and IOS. The site also contains information on how you can make your Apps work with bridfegy.
SDK's like this are needed in places with poor internet connection.
Copied text in quotes from Bridgefy.com
Link

This is posted on Steemhunt - A place where you can dig products and earn STEEM.
View on Steemhunt.com
Hi @ogochukwu,
Thanks for your hunt. I’ve reviewed and approved it. The hunt is on.
Please read our posting guidelines.
Connect with Steemhunt
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
Need to see, if there would also be a possibility of security breach when all the devices are connected ?
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit
Congratulations!
We have upvoted your post for your contribution within our community.
Thanks again and look forward to seeing your next hunt!
Want to chat? Join us on:
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
Submit