Sandboxx

Sandboxx

Connecting our Military

174K ratings
936 reviews
Free

Details

  • Released
  • Updated
  • October 7, 2014
  • September 12, 2026

Features

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About

Easily send digital letters, photos, and gift cards to service members in basic training and beyond. Receive weekly training updates and access military news and products. Developed by veterans to support the military community.

Digital letter writing
Overnight shipping
Letter tracking
Weekly training updates
Military news
Gift card options
Veteran support staff
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What users say

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+1

What's New in Sandboxx

20.49.3

September 12, 2026

We update Sandboxx frequently to support you throughout your military journey. This release includes: - Fixed issues with some user getting logged out - Updated performance when writing a Letter - Updated authentication to make signing up and logging in more secure and easy - General performance improvements and bug fixes Love the app? Rate us! Have a question or need help? Email us at happiness@sandboxx.us, we'd love to hear from you.

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Charts

Top Free

📈 90+1

Lifestyle

This app rose +1 position in Lifestyle chart.

Last updated on September 17, 2026.

User reviews

Extortion

This app is bs. Regular mail is being withheld and this service is being pushed. 4 dollars a letter, and everywhere you look, some sort of add-on upcharge. Daily news and bible quotes being sold? Seriously? Am I supposed to believe this company cares when it is clearly fist-in-mouth profit? It’s a sweet idea and a cute sob story being sold, but bare in mind you’re being sold a service that already exists (U.S. mail, a real American product), and it’s highly suspicious that no other mail gets through but these promise it. In addition, this company is using ai, which means it’s outsourcing jobs for people to computers. Doesn’t feel very people-oriented, or American to me. Just greedy.
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Quick and near effortless delivery of mail! Much better than the US Postal Service

I downloaded Sandboxx on the advice of my daughter‘s recruiter. At first, I didn’t know that it was a paid for service so that put me off a little bit and I decided I would use the US mail instead. That quickly changed when I paid $13 for a priority letter that took 11 days to get there when they claim 1 to 3 and most locations. I didn’t think an Army base in Missouri would not include most locations, and all I got from the Postal Service was “we’re sorry.”
Part of the reasons why I pay my bills online.

The Sandboxx app has been wonderful with three to four days max to get a letter to her while she’s in Boot Camp is amazing and it’s not much more expensive than US mail. The only thing that I can’t do is send handwritten letters, which I enjoyed doing, but that’s the price of technology in speediness.
I highly recommend this app if you’re trying to communicate with those in Service.
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Trash

This app is trash. It’s hard to send letters you gotta go through 1 million and one down steps just so you can actually send a letter it cost $65 to send 12 letters come on man y’all gotta do better than this.

Fraud and abuse gift cards

Do not send them your recruit won’t receive them.

Thank you

Thank you for the service. I am blind and using this app is much easier for me to send letters to my nephew. Thank you very much for the service, the service of the Sandboxx app and the service to our country.

Developer apps

User experience

🐞

Reported Bugs

3 issues

Login issues and password reset problems

Bug

Inconsistent letter delivery tracking

Bug

Incorrect recruit information entered by Sandboxx

Bug

Requested Features

5 requests

Allow editing of letters before sending

Feature

Increase photo upload limit

Feature

Provide refund or credit expiration policy

Feature

Improve in-app search and address management

Feature

Sync weekly updates with recruit's actual schedule

Feature

FAQ

What does Sandboxx do?

Sandboxx is a mobile application designed to support service members and their loved ones throughout their military journey. It allows users to easily send digital letters, photos, and gift cards to recruits in basic training and beyond. The app also provides weekly training updates, military news, and access to a shop for related products.

How do I send a letter with Sandboxx?

You can write your letter directly within the Sandboxx app, add photos and gift cards if desired, and then send it. The app handles the physical printing, includes return stationery, and provides overnight shipping to the recruit's base. You can also track your letter's journey from Sandboxx HQ to the base mailroom.

Is Sandboxx free to use?

The Sandboxx app itself is free to download and use. However, there are in-app purchases for sending letters, adding gift cards, and purchasing items from the Sandboxx Shop. Users can also earn free letters by referring friends and family.

What kind of support does Sandboxx offer?

Sandboxx offers comprehensive support for those sending mail to service members. This includes a fully digital letter writing experience, overnight shipping with tracking, weekly updates on recruit training progress, and access to military news. Customer support is also available, staffed by veterans and military spouses.

Who is Sandboxx for?

Sandboxx is designed for anyone who wants to support a service member, particularly those in basic training or deployed overseas. This includes parents, spouses, siblings, friends, and other loved ones who wish to stay connected and provide encouragement.