20.8K reviews
Content rating
Everyone
1M+
Downloads
Content rating
Everyone
Users Interact, Digital Purchases
Learn more
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About this app

Developed by veterans with decades of service, our mission is to support service members and their supporters throughout their military journey.

Sending letters to basic training and beyond has never been easier. With over 8 million letters sent to date, we have revolutionized the way you think of supporting your service member. A fully digital letter writing experience, overnight shipping, tracking and the option to add gift cards makes Sandboxx the ultimate supporter tool.

With a growing community of over 2 million Sandboxx users, we are continuing to build more products to help. Get access to base specific training updates from within the app as your recruit progresses through basic training. Refer friends and family to earn free Letters and ensure your service member can receive even more mail.

Check out Sandboxx News to stay up to date with all that's going on in the military space. Grab some additional stamps, newsletters or motivation to mail your recruit in the Sandboxx Shop.

With Sandboxx, we've got you covered for all your basic training needs.

SEND LETTERS TO BASIC TRAINING AND BEYOND
The easiest way to send letters to basic training or overseas. Send a letter, anytime, anywhere. We physically print your mail, include return stationery, provide tracking and overnight it to your recruit at any recruiting base.

GET WEEKLY TRAINING UPDATES
Stay up to date on your recruit as they progress through basic training. Learn about what they are going through on a weekly basis, all accessible within the Sandboxx app.

LEARN MORE WITH SANDBOXX NEWS
Your essential source of news from within the military space, Sandboxx News brings you a wealth of information to stay up to date on the ever evolving world of military life. Covering news to lifestyle to military affairs, the Sandboxx Editorial team brings decades of real life experience and education straight to your phone.

GET EXCLUSIVE SANDBOXX PRODUCTS
Whether you want to purchase military apparel for yourself or set up a daily mail send for your recruit, the Sandboxx Shop stocks a wide variety of recruit and supporter centric products that are sure to delight your recruit's entire support system.

• OPSEC and PERSEC compliant
• Automatically connect with your service member to easily send letters
• Write your letter, add photos and gift card and send within minutes
• Track your letter from Sandboxx HQ to the base mailroom
• Access to customer support fully staffed by veterans and military spouses

No Federal or DoD Endorsement Implied.
Send Letters Overnight to Your Recruit
Updated on
Oct 30, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, Personal info, and Device or other IDs
  • This app may collect these data types
    Location, Personal info and 6 others
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

20.4K reviews
Mary Tennison
December 28, 2021
The letter writing is nice & simple. Notification that recruits write back was awesome. I found the "mail delivered!" notifications to be misleading as it is not possible to confirm when any mail is actually placed into the hands of a recruit. That feels like marketing, seems unfair to users. It is extremely frustrating to get a notification about dates of closure, deadlines for delivery, etc. but if you hit the wrong key you can't find that detail again. Repeat notifications are annoying too
82 people found this review helpful
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A Google user
May 10, 2019
You get an unsolicited SMS that doesn't mention that it is a pay for letter service ($3.99, good value for what you get). You also get a weekly update of their activities. I love the idea, am ok with paying for a service, but it's wrong to do the bait and switch thing, and in the Play Store it doesn't even have the "in-app purchases" badge.
52 people found this review helpful
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Sandboxx, Inc.
May 10, 2019
Hi, Jan. Thank you for your feedback. For any further questions or concerns please send an email to happiness@sandboxx.us. We would be happy to help.
Mya Larsen
December 10, 2020
I would have given 5 stars. It's been really good up until now. an update I guess ruined it. I've been sending lots of letters to my recruit since october. But now It won't let me have access to my photos and camera so I can no longer send my recruit any form of photos. It told me it denied my access. And I've looked in my settings for both phone and app but both have access to each other. Please look into it, so I can send my recruit more photos.
10 people found this review helpful
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Sandboxx, Inc.
December 15, 2020
Hi, Mya. Our Tech Team is aware of this issue and we have a fix. You would just need to update your app to our newest version through Google PlayStore to proceed. Give that a try and reach out if you continue to have issues. You can reach our Customer Happiness Team in the app. Go to your Profile and click on the Chat Bubble at the top right.

What’s new

We update Sandboxx frequently to support you throughout your military journey. This release includes:

- General bug fixes and maintenance

Love the app? Rate us! Have a question or need help? Email us at happiness@sandboxx.us, we'd love to hear from you.