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.
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 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
No Federal or DoD Endorsement Implied.
Love the app? Rate us! Have a question or need help? Email us at happiness@sandboxx.us, we'd love to hear from you.
더 보기 We update Sandboxx frequently to better support you throughout your military journey. Here’s what’s new:
- Fix Weekly Updates calendar view to better show current week
- A brand new Cart experience. Items now stay in your cart, so you can easily come back and complete your purchase later.
- Updates to Newsletters, including support for single week options.
- Weekly Updates visual improvements for users with dynamic type set.
- A simpler Letter review experience. Easily see what’s included with your Letter and what else you can add before sending.
- One checkout for Letters and Letter Bundles. Purchase Letter Bundles and send your Letters together in a single checkout.
- Performance improvements and bug fixes to keep Sandboxx running smoothly.
Love the app? Leave us a rating! Have a question or need help? Email us at happiness@sandboxx.us. We’d love to hear from you.
24.0.2 10월 7일
We update Sandboxx frequently to better support you throughout your military journey. Here’s what’s new:
- A brand new Cart experience. Items now stay in your cart, so you can easily come back and complete your purchase later.
- Updates to Newsletters, including support for single week options.
- Weekly Updates visual improvements for users with dynamic type set.
- A simpler Letter review experience. Easily see what’s included with your Letter and what else you can add before sending.
- One checkout for Letters and Letter Bundles. Purchase Letter Bundles and send your Letters together in a single checkout.
- Performance improvements and bug fixes to keep Sandboxx running smoothly.
Love the app? Leave us a rating! Have a question or need help? Email us at happiness@sandboxx.us. We’d love to hear from you.
24.0.1 10월 6일
We update Sandboxx frequently to better support you throughout your military journey. Here’s what’s new:
- A brand new Cart experience. Items now stay in your cart, so you can easily come back and complete your purchase later.
- A simpler Letter review experience. Easily see what’s included with your Letter and what else you can add before sending.
- One checkout for Letters and Letter Bundles. Purchase Letter Bundles and send your Letters together in a single checkout.
- Performance improvements and bug fixes to keep Sandboxx running smoothly.
Love the app? Leave us a rating! Have a question or need help? Email us at happiness@sandboxx.us. We’d love to hear from you.
24.0.0 9월 29일
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.
20.49.3 9월 12일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- 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.
20.49.2 9월 2일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
-
- 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.
20.49.1 8월 26일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated authentication to make signing up and logging in more secure and easy
- Update recipient name display when creating and managing recruits
- Updated buying Sandboxx Letters to make the process even easier
- Fixed issue sending Letters when viewing Weekly Update list
- 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.
20.49.0 8월 24일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Fixed an issue with promo savings not reflecting in cart
- Updated buying Sandboxx Letters to make the process even easier
- Updated referrals to more clearly indicate what step your invites are in
- 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.
20.48.1 7월 30일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated buying Sandboxx Letters to make the process even easier
- Updated referrals to more clearly indicate what step your invites are in
- 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.
20.48.0 7월 27일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated onboarding to help grow your support
- Updated Sandboxx Community
- 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.
20.47.0 7월 13일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated Letter tracking map
- Updated onboarding to help grow your support
- 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.
20.46.0 6월 30일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- NEW! Now you can use Venmo to make purchases
- Updated Letter tracking visuals
- Sandboxx News is now located in the Home tab
- 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.
20.45.0 6월 22일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated home dashboard layout to make it easier to find what you need
- Improved Community navigation experience
- Improved support for dynamic font sizes
- 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.
20.44.0 6월 3일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- NEW! Mail Sandboxx Newsletters straight to your recruit, no Letter needed
- Manage your Newsletter recipients and pause delivery anytime, right in the app
- 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.
20.43.0 5월 20일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Sandboxx Community can now be accessed directly in the Community tab
- Address Book improvements
- 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.
20.42.0 5월 13일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Introducing AI-powered voice-to-letter: just speak your thoughts and we'll turn them into a heartfelt letter
- Now available in English and Spanish, with auto-save so you never lose your words
- Redesigned letter preview for a smoother writing and sending experience
- Refreshed Weekly Updates with a new card design, richer details, and easier sharing
- 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.
20.41.1 4월 27일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Weekly Updates has a brand new look, making it easier than ever to find information about your recruit
- UI improvements and optimizations
- 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.
20.40.0 4월 15일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated and simplified Address Book
- Updated landing screen for recruit users
- Updated Support Squad experience to make it even easier to connect with supporters and write Letters
- 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.
20.39.0 4월 6일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated Support Squad experience to make it even easier to connect with supporters and write Letters
- Updated profile experience
- Show Apple Pay when no credit cards added
- 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.
20.38.1 3월 17일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated Support Squad experience to make it even easier to connect with supporters and write Letters
- Updated profile experience
- 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.
20.38.0 3월 16일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated Community experience with access to our new Sandboxx Community App
- Support International phone numbers
- Updated referral design
- Update Support Squad invite form
- 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.
20.37.1 3월 2일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated Community experience with access to our new Sandboxx Community App
- Support International phone numbers
- 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.
20.37.0 2월 11일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated onboarding experience
- New content for Delayed Entry Program recruits
- Recruits and recruiters can write Letters
- 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.
20.36.1 1월 26일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Updated onboarding experience
- New content for Delayed Entry Program recruits
- 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.
20.36.0 1월 15일
We update Sandboxx frequently to support you throughout your military journey. This release includes:
- Crop Letter photos as either a square or rectangle
- Updated app support for iOS 26 and Liquid Glass
- Updated Support Squad
- 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.
20.35.1 1월 5일
We update Sandboxx frequently to better support you throughout your military journey. Here’s what’s new:
- Fix Weekly Updates calendar view to better show current week
- A brand new Cart experience. Items now stay in your cart, so you can easily come back and complete your purchase later.
- Updates to Newsletters, including support for single week options.
- Weekly Updates visual improvements for users with dynamic type set.
- A simpler Letter review experience. Easily see what’s included with your Letter and what else you can add before sending.
- One checkout for Letters and Letter Bundles. Purchase Letter Bundles and send your Letters together in a single checkout.
- Performance improvements and bug fixes to keep Sandboxx running smoothly.
Love the app? Leave us a rating! Have a question or need help? Email us at happiness@sandboxx.us. We’d love to hear from you.
더 보기 버전 24.0.2 10월 7일
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