iPhone Screenshots


Developed by veterans with decades of service, SANDBOXX connects service members to their loved ones, to each other, & to expert military knowledge, illuminating the entire military journey.

With SANDBOXX, service members and their loved ones can stay in touch, no matter how far apart they may be. Digitizing the time-consuming processes of sending physical letters and simplifying the booking of military-related travel, Sandboxx empowers service members to maintain meaningful bonds with family and friends back home. Whether it is a recruit receiving a letter and photograph on the third day of boot camp, or an active duty soldier flying to his parents for Christmas, or a single mother attending her son’s basic training graduation, SANDBOXX transforms quality contact with loved ones from a possibility to a reality.

What's New

Version 4.1.2

FIXED: We have fixed random crashes that occur when you view the Letters dashboard screen.
FIXED: We fixed an issue causing a crash when you searched on Units.
FIXED: We've made some minor user-interface changes on the mailbox view, keeping fonts consistent and button styles.
ADDED: We have launched a referral-rewards program! Give a Letter and Get a Letter! Invite your friends, family members and colleagues to support your service member who’s off the grid. Get rewarded with a Letter credit if you refer a new Sandboxx user (and any future new users) once they sign up and send their first Letter.

Ratings and Reviews

4.3 out of 5

480 Ratings

480 Ratings

Best way to connect!

Hawaiian hilo gurl

This is far the best app ever! We are able to stay connected to our son while he is at basic training in San Diego and send him letters fast. We are able to write him letters today and he gets them tomorrow. Its the fastest way to get motivational letters to him. Plus every time we write he gets a return address envelope too. With technology nowadays it is hard to stay so connected to our recruits while in training, but being able to write our son knowing that he gets it so soon really helps. In addition we also get notifications of how our recruits are doing and what they are doing during the weeks of training which really helps lead our letters. I absolutely love this app and everyone should have this app if they have a Recruit in training. It costs a little money to send a letter but we purchase the family pack its like $35 for 15 letters and trust me from a mom to another mom it is so totally worth it. To think of everything you get! You get that VIP letter treatment and you get that up to date information on your recruit as well. Also, my recruit was recently dropped due to medical reasons and they were able to get me his new address in seconds. Coming from a mom who was going crazy trying to find his new address with no other contact and no other way to get ahold of my son this app has gone above and beyond words for me and my family and I am so happy and truly thankful!! Thank you Sandboxx!!

Developer Response

We are so glad to hear that you had a positive experience with Sandboxx. It is our goal to make recruit training easier for the parents and the recruits

The app to get if you know someone joining the military


If you have someone going to boot camp or basic training this is a must download. The app allows you to send letters to boot camp straight from your phone. No post office no envelopes no stationary needed. Although I did still write letters I ended up sending more Sandboxx letters as my at the time marine officer candidate requested me to use sandboxx because he was getting mail faster. Not only do you get to send letters but every week they send you what your recruit is doing that week during training along with letter topics and suggestions in case you don’t know what to write about.

Whenever I had an issue with the app the customer support team was extremely helpful and responsive. All my issues were taken care of and I could focus on supporting my loved one with letters. This is a great app to keep our loved ones motivated during the hardest time of their life. I would recommend again and again.

Developer Response

We are so glad to hear that you had a great experience with Sandboxx. We strive to make supporting recruits easy for parents, family, and friends.

Son in boot camp


Got the link to this app from my son who filled out a card after getting to boot camp. Not sure if he has the ability to send me letters from it, as I’ve received nothing from him so far. He is in week 3 of Marine Corp training at MCRD San Diego.
This app seems to have some bugs. Can’t look him up via the Kin tab on the iPhone. App just crashes.
App needs an iPad version. I’m using the iPhone version on the iPad, but it’s not a perfect fit, mostly because the keyboard covers buttons you may need to click on. The iPhone doesn’t have this issue, since it’s screen and keyboard size is native to the app.
The cost of sending a letter is a bit pricey, but maybe not so bad if I were sending it overseas, so time will tell...the tracking feature is good.
So with a few fixes and tweaks, I think this could be a sold 5 Star app for the intended purpose.

Developer Response

Thank you for the positive feedback. Is there anything that we could do better- that would change your rating to 5 stars?


Sandbox Family Communication, Inc
80.3 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Sandbox Family Communications, Inc


  • Wallet

    Get all of your passes, tickets, cards, and more in one place.

  • Family Sharing

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

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