# 21express vs HTML Sandbox³

The clearest difference is update cadence: HTML Sandbox³ at daily against 21express's monthly. 21express's advantage is device support (3 vs 1) and iOS requirement (7.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

21express ships an update monthly, HTML Sandbox³ daily. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | 21express | HTML Sandbox³ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/html-sandbox/id6467677088/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Monetization | Free | Free |
| Size | 16 MB | 13 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Crocodic Studio](https://appshunter.io/developer/941979139) | [Eric Roembach](https://appshunter.io/developer/1632108694) |

## What reviewers say

### 21express

[App page](https://appshunter.io/ios/app/21express/id1036174567)

This app provides services for package and document delivery across Indonesia. It allows users to check shipping costs, track packages, and request order pickups, simplifying online selling and purchasing.

**Highlights:** Check shipping costs (domestic & international), Track packages, Request order pickups, Door-to-door service, Computerized shipment checking, Competitive pricing

**Features:** macOS Compatibility

**In-app purchases:** none


### HTML Sandbox³

[App page](https://appshunter.io/ios/app/html-sandbox/id6467677088)

Design custom lock and home screens with dynamic shortcuts for weather, battery, calendar, and RSS feeds. Join a large community for themes and support.

**Highlights:** Custom lock screen design, Custom home screen design, Dynamic shortcut integration, Weather shortcuts, Battery status shortcuts, Calendar event shortcuts, RSS feed shortcuts

**In-app purchases:** none


## Frequently asked questions

### Is 21express free?

21express is free to download, with no in-app purchases.

### Is HTML Sandbox³ free?

HTML Sandbox³ is free to download, with no in-app purchases.

### Do 21express or HTML Sandbox³ have ads?

Neither 21express nor HTML Sandbox³ shows ads.

### Which is updated more often, 21express or HTML Sandbox³?

21express ships an update monthly, and HTML Sandbox³ daily. Most recently, 21express was updated on October 21, 2026 and HTML Sandbox³ 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.*