51+ iOS apps & games curated and reviewed
With an average user rating of 3.8★, the sandboxx letter category is one of the App Store's strongest. Browse all 51+ apps and games we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.9★ (166K) | No | No | Aug 2026 |
| 2 |  | Free | 3.8★ (141) | Yes | Yes | Jul 2026 |
| 3 |  | Free | 4.3★ (29K) | Yes | Yes | Aug 2026 |
| 4 |  | $2.99 | 3.7★ (44) | No | No | Aug 2026 |
| 5 |  | Free | 3.4★ (70) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.0★ (832) | No | Yes | Aug 2026 |
| 7 |  | Free | 3.7★ (3) | Yes | No | Jul 2026 |
| 8 |  | Free was $0.99 | — | No | Yes | Aug 2026 |
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.
Create anything you can imagine in this physical sandbox. With over 1000 objects, build vehicles, structures, and more. Enjoy water physics for boats and play with friends in various game modes.
Explore an endless cubic world where you can build, survive, and create your own adventures. Gather resources, craft tools, construct buildings, and farm or hunt in diverse biomes. Enjoy a rich voxel universe with various game modes and character customization.
This sandbox building game offers limitless freedom to create and destroy with blocks, similar to Lego. Build anything from houses to entire cities in a 3D virtual world, with options for single and multiplayer modes. Explore, mine, craft, and let your imagination run wild.
Design and construct unique destructive machines in an open-world sandbox. Engage in combat with various enemies across land, sea, and air using your custom-built creations. The intuitive editor allows for complex control schemes for any vehicle.
Explore an open-world physics sandbox with friends. Manipulate objects, experiment with physics, and build creations in diverse locations. Enjoy multiplayer freedom with customizable server rules for object creation and deletion.
Craft professional cover letters quickly for any job application. Input your details and tailor your letter with easy editing tools. Save, preview, and export your polished cover letter as a PDF to share instantly.
Send personalized digital letters with a handwritten feel. Choose from various themes and add expressive stickers. Create a custom font from your own handwriting for truly unique messages.
Stay informed with military news, defense analysis, and national security updates. This app delivers breaking stories, expert reporting, and video briefings tailored for the military community and defense enthusiasts.
Engage in chaotic sandbox adventures with physics-bending fun. Battle with wacky weapons, build custom arenas, and explore vibrant worlds with unique ragdoll characters. Unleash your creativity in this open-world simulator.
This app provides over 400 free letter and application templates for students and professionals. It covers various categories, including social invitations, job offers, and business agreements, with features for sharing, bookmarking, and searching.
Engage in a dynamic particle physics playground with full rotation. Discover how various elements interact to produce captivating outcomes, offering both creative freedom and educational opportunities.
Match the color of sand to the correct box to clear each level. This engaging game offers a satisfying challenge with its simple yet addictive gameplay. It's a colorful puzzle experience that will keep you hooked.
Create your own worlds by placing blocks in this sandbox game. Build anything imaginable without the threat of monsters. Explore a vast array of blocks to bring your creative visions to life.
Create dazzling sand artwork by pouring colorful sand into glass bottles. Challenge yourself to fill every bottle and become the best sand artist globally.
This app provides a digital mailbox service, delivering your physical mail to your phone. It aims to eliminate paper mail and clutter, offering digital coupons and discounts from local merchants.
This app acts as a personal mail administrator for users who travel or live abroad. It receives your mail, sends you a picture, and then allows you to choose forwarding, storage, destruction, or opening and scanning.
This app is the essential companion for the BBC micro:bit, a pocket-sized programmable computer. It allows you to wirelessly beam programs to your micro:bit via Bluetooth and includes access to a block-based programming editor. Monitor sensor data and control your micro:bit in real-time.