# Sandboxx vs Flush Royale

The clearest difference is chart position: Sandboxx at #114 against Flush Royale's unranked. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sandboxx ships an update every 10 days, Flush Royale every 2 weeks. The most recent releases landed on October 23, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Sandboxx | Flush Royale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (180K ratings)](https://appshunter.io/ios/app/sandboxx/id912636512/reviews)** | — |
| Number of ratings | **180K** | — |
| Positive reviews | 72.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#114** | — |
| Size | 122 MB | 59 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sandboxx, Inc.](https://appshunter.io/developer/912636515) | [Matti Svatizky](https://appshunter.io/developer/1889793675) |

## What reviewers say

### Sandboxx

[App page](https://appshunter.io/ios/app/sandboxx/id912636512)

**Currently charting:** #114 Top Free · Lifestyle (US App Store)

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.

**Highlights:** Digital letter writing, Overnight shipping, Letter tracking, Weekly training updates, Military news, Gift card options, Veteran support staff

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Overnight delivery
- 📨 Convenient letter writing
- 📷 Ability to include photos
- 📝 Provided stationery and return postage
- 📢 Weekly updates on recruit's training

**What reviewers complain about**

- 💰 Expensive per letter
- 🐛 Frequent app crashes and bugs
- 🕰️ Delays in letter delivery
- 🔍 Difficulty finding recruit's address
- 🗓️ Outdated weekly updates

**Reported bugs**

- Login issues and password reset problems
- Inconsistent letter delivery tracking
- Incorrect recruit information entered by Sandboxx

**Requested features**

- Allow editing of letters before sending
- Increase photo upload limit
- Provide refund or credit expiration policy
- Improve in-app search and address management
- Sync weekly updates with recruit's actual schedule


### Flush Royale

[App page](https://appshunter.io/ios/app/flush-royale/id6761459412)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Sandboxx free?

Sandboxx is free to download, with no in-app purchases.

### Is Flush Royale free?

Flush Royale is free to download, with no in-app purchases.

### Do Sandboxx or Flush Royale have ads?

Neither Sandboxx nor Flush Royale shows ads.

### Which is updated more often, Sandboxx or Flush Royale?

Sandboxx ships an update every 10 days, and Flush Royale every 2 weeks. Most recently, Sandboxx was updated on October 23, 2026 and Flush Royale on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*