Sandboxx
Lifestyle
Send Letters Overnight to Your Recruit 📬
- Rating
- 4.0
- 20.7K ratings
- Downloads
- 1.3M+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Oct 1
- 2026 · v24.0.1
Screenshots
About Sandboxx
Over 975,000 Sandboxx members have sent more than 3 million letters to support our military. Get connected with your recruit automatically and send letters with ease and speed. Sandboxx overnights your Letters to all recruiting bases and is the fastest way to support your loved ones.
Book everything for graduation travel and beyond, from flights and hotels to rental cars. Refer friends to earn free Letters or sponsor your recipient to boost morale. Stay up to date with weekly content as your recruit progresses through basic training. With Sandboxx, you’ll never miss a moment.
Developed by veterans with decades of service, Sandboxx connects service members to their loved ones, to each other and to expert military knowledge, illuminating the entire military life journey.
SEND LETTERS TO BOOT CAMP AND BEYOND
Send letters to basic training or overseas faster and easier than ever. We physically print your mail, include a return envelope, provide tracking and overnight it to your recipient at any recruiting base.
GET WEEKLY UPDATES
Stay up to date on your recruit as they progress through basic training. Never miss a moment as they prepare for critical milestones and challenges in their military training.
BOOK FLIGHTS, HOTELS, and CARS
Book your next flight or hotel with Sandboxx. Our Travel team is a dedicated tribe of military family members expertly trained to guide you through all of your travel needs, on and off base.
BECOME A KIN
Connect with other military families on their journey to encourage, share and discover information and helpful advice.
• OPSEC and PERSEC compliant
• Automatically connect with your service member to easily send letters
• Get up to date Letter tracking
• Book flights, hotels and rental cars for your recruit’s graduation or next trip
• Get pro tips for travel on and off base
• Browse recommended travel partners and get access to exclusive travel benefits like Travel Plus
• Boost morale by sponsoring your military service member
No Federal or DoD Endorsement Implied.
Book everything for graduation travel and beyond, from flights and hotels to rental cars. Refer friends to earn free Letters or sponsor your recipient to boost morale. Stay up to date with weekly content as your recruit progresses through basic training. With Sandboxx, you’ll never miss a moment.
Developed by veterans with decades of service, Sandboxx connects service members to their loved ones, to each other and to expert military knowledge, illuminating the entire military life journey.
SEND LETTERS TO BOOT CAMP AND BEYOND
Send letters to basic training or overseas faster and easier than ever. We physically print your mail, include a return envelope, provide tracking and overnight it to your recipient at any recruiting base.
GET WEEKLY UPDATES
Stay up to date on your recruit as they progress through basic training. Never miss a moment as they prepare for critical milestones and challenges in their military training.
BOOK FLIGHTS, HOTELS, and CARS
Book your next flight or hotel with Sandboxx. Our Travel team is a dedicated tribe of military family members expertly trained to guide you through all of your travel needs, on and off base.
BECOME A KIN
Connect with other military families on their journey to encourage, share and discover information and helpful advice.
• OPSEC and PERSEC compliant
• Automatically connect with your service member to easily send letters
• Get up to date Letter tracking
• Book flights, hotels and rental cars for your recruit’s graduation or next trip
• Get pro tips for travel on and off base
• Browse recommended travel partners and get access to exclusive travel benefits like Travel Plus
• Boost morale by sponsoring your military service member
No Federal or DoD Endorsement Implied.
What’s new
Version 24.0.1 · Updated October 1, 2026
We update Sandboxx frequently to support you throughout your military journey. This release includes: - Fixes for sending support squad letters. Love the app? Rate us! Have a question or need help? Email us at [email protected], we'd love to hear from you.
User reviews
This is a great way to send letters to your loved ones...fast! I like the fact that it shows when your letter has been delivered, unlike snail mail. I just wish they could write back!
Great way to communicate with your soldier! It makes it easy to write letters when you don't have time to sit down and write. You can easily add a picture or collage. It's only printed on paper, but it still helps your soldier/SIT stay connected. It also sends you a notification when they have written you back so yo...
Thank you so much for this app love it
just writing to my son is the best thing ever I feel like I am so close knowing that he gets these letters really quick so I support sandbox!
amazing to get letters to my soldier so fast!
Sandboxx has been so amazing to have and use while my son is at bootcamp! The only way it could be better, is if I had found it earlier. I have sent 33 letters to my son so far and I will continue to send him daily letters as long as I can!
Frequently asked questions
How many letters have been sent by Sandboxx members?
Over 975,000 Sandboxx members have sent more than 3 million letters to support our military.
How does Sandboxx help with sending letters?
Sandboxx overnights your Letters to all recruiting bases and is the fastest way to support your loved ones.
Can I book travel arrangements with Sandboxx?
Yes, you can book flights, hotels, and rental cars for graduation travel and beyond with Sandboxx.
How can I earn free Letters with Sandboxx?
You can refer friends to earn free Letters or sponsor your recipient to boost morale.
How does Sandboxx keep me updated on my recruit's progress?
You can get weekly updates as your recruit progresses through basic training with Sandboxx.
Who developed Sandboxx?
Sandboxx was developed by veterans with decades of service.
What services does Sandboxx provide for military families?
Sandboxx connects service members to their loved ones, to each other and to expert military knowledge, illuminating the entire military life journey.
How does Sandboxx handle letter sending to boot camp and beyond?
Sandboxx physically prints your mail, includes a return envelope, provides tracking, and overnight it to your recipient at any recruiting base.
Is Sandboxx compliant with OPSEC and PERSEC standards?
Yes, Sandboxx is OPSEC and PERSEC compliant.
Can I book flights and hotels with Sandboxx?
Yes, you can book your next flight or hotel with Sandboxx.
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