Sandboxx 4+

Connecting our Military

Sandboxx, Inc.

    • Free



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 6 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 1 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 or book your graduation trip with Sandboxx Travel.

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

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.

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.

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.

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 a photo 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
Earn badges and become your recruit’s ultimate supporter
Book flights, hotels and rental cars for your next trip

No Federal or DoD Endorsement Implied.
Love the app? Rate us! Have a question or need help? Email us at, we'd love to hear from you.

What’s New

Version 14.2.1

We update Sandboxx frequently to support you throughout your military journey. This release includes:
- General bug fixes and app maintenance

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

Ratings and Reviews

4.8 out of 5
76K Ratings

76K Ratings

75Steph ,

Thankful Mom

I’ll admit I was skeptical of paying for a service to send letters to my son when I could send him a handwritten letter from home. However, our family has come to life Sandboxx and what it provides for us. We still send those handwritten letters from home as we love doing that as all the letters he sends us are handwritten and I think he enjoys those. Sandboxx has given us the option to write a letter at lunch or on our breaks at work. The option to add one picture (my tip is to make a picture collage and add multiple pics to our letters that way) and have him receive the letter quicker than He could regular mail. If I send before 4 pm eastern time, the letter ships that evening and it’s received on post the next day. He usually doesn’t receive until the following day, but still a faster way to communicate to him. We also love that he gets paper and an envelope to mail back. I can also add return postage and he doesn’t even have to worry about the stamp! What’s even better for this mom, is when he replies I get a notification that I’m getting mail back from him. Sandboxx customer service has been quick and super friendly and helpful! Don’t hesitate to give it a try, it’s a wonderful way to provide support to your family and/or friends!

CreyFsh16 ,

Good but a bit pricy

I really like this app a lot! It’s very convenient when you don’t have the time to write a letter by hand and go through the process of having to put it in an envelope, writing the address, finding stamps then looking for a mailbox. It’s kinda like texting a message from the phone which is what everyone does nowadays. It also sends photos from your phone so you won’t need to print any to send them but only one per letter. It lets you know updates and changes the person you’re writing too is going to be going through at basic training.
I think my only issues is how many notifications it sends of when you send a letter, it keeps giving me three notifications at the same time saying the same thing, “you’re letter has been delivered”. The other thing is that letters are $4 each but they do cut the price a little when you by big bundles but you also get taxed.
For me, I think it’s pretty expensive but I would send daily letters to my husband while he was at basic and he got the letters very quickly. Usually when I got a call, he was pretty much up to date unless I said something that happened yesterday or couple days ago. The letters I sent from Sandboxx got received a few days after I sent it while hand written ones I got from my husband took a week.
All in all, Sandboxx is pretty good, letters are easier to write, less time consuming and they send the letters quickly. Only problem is the price of letters really.

Bon Kid ,

Sandboxx letters

This is a wonderful service in keeping up with technology and the New Army. I would recommend that you give new customers that purchase your service access to a sample copy of the newsletters you offer. The daily motivation, the scripture verses and the off duty. Since I have no clue what is actually in these, I do not intend to spend more money for something my son may not even care to have. I know during my Boot Camp days, many centuries ago, I never had the time or energy to read anything other than my training manuals. I gave you three stars because of the weekly updates. While it is fantastic to get an idea of what specific training cycle my son is experiencing, and your tips on questions to ask is very helpful. I think you could add an additional paragraph that specifically relates to the recruit and the unit he is in. Like who his Drill Sergeants are and their bio’s, the kind of meals he is getting at the chow hall, to include field rations and MRE’s. Something more specific about the platoon he is in. Which recruits were made squad leaders and guide and meritorious promotions. How many hours they spent in Drill, or on the range. Just my opinion. I know that info would require your staff have a closer connection and communication with the Platoon. Of course we wouldn’t want unneeded distraction from training. Otherwise, your service is fantastic and I wish you all the success.
Wm David Linley
(SSGT, USMC, 17-yrs, SDVOSB)

Developer Response ,

Hi. Thanks for your feedback. Our Sandboxx Team will look into your suggestions. We're happy that you used Sandboxx to stay connected to your son at basic training. Thank you for letting us be a part of your military journey and also for your service to our country as well.

App Privacy

The developer, Sandboxx, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Contacts
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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