iPhone Screenshots


LMK App is the easiest way to invite friends to get together for hiking, movies, lunch – just about anything. With LMK App, friends receive an invitation and reply either IN or OUT to let you know who’s IN. When someone replies OUT, they don’t have to make an excuse. LMK App takes care of the excuse for them.

LMK (Let Me Know)

• Uses SMS text to invite friends that don’t have the app
• Shows everyone invited who’s IN and who’s OUT
• Reminds friends who have not answered to reply IN or OUT
• Helps your friends who can’t attend by giving them an excuse (lame excuse, but fun)
• Send invitations to friends via Facebook, E-mail and Text
• Super easy to re-create past events like football Sundays, game nights, happy hours….

What’s New

Version 1.3.0

This app has been updated by Apple to use the latest Apple signing certificate.

Users can now invite people to events by Facebook, E-mail and Text. Updates made to app for minor bug fixes.

Ratings and Reviews

3.8 out of 5
4 Ratings

4 Ratings

Todd TMB ,

It’s working again!!!

Love this app when it’s working as it’s an easy way to invite friends and for everyone in the group to know who’s attending certain events. It was down for several months but is now working again. Hopefully it stays that way. 5 stars for when it’s working!

cpwilson5 ,

Great RSVP Tool

I use it for our weekly soccer games and making sure we have enough players easily without spamming people with everyone's responses to group texts. It centralizes all the responses and gives me the total count and who is "in" or "out". Recommend to anyone wanting text RSVPs for any type of event.

BrittBrittLew ,



App Privacy

The developer, SphereMicro, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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