# Sandbox Smart vs Coffee DTR Timer

The clearest difference is review sentiment: Coffee DTR Timer at 100% against Sandbox Smart's 33%. Coffee DTR Timer also leads on in-app purchases (none vs 1) and update cadence (every 9 days vs every 2 months). Sandbox Smart's advantage is iOS requirement (12.0 vs 18.5). On price, ads and device support there is nothing between them.

Both are free to download. Sandbox Smart sells 1 in-app purchase, starting at $4.99 per month. Coffee DTR Timer asks for nothing beyond the download.

Sandbox Smart ships an update every 2 months, Coffee DTR Timer every 9 days. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Sandbox Smart | Coffee DTR Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (7 ratings)](https://appshunter.io/ios/app/sandbox-smart/id1492957836/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 93 MB | 1 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sandbox Smart Technology Co., Ltd.](https://appshunter.io/developer/1522236498) | [Mike Whaley](https://appshunter.io/developer/1720535901) |

## What reviewers say

### Sandbox Smart

[App page](https://appshunter.io/ios/app/sandbox-smart/id1492957836)

Control your smart coffee bean roaster via Bluetooth. Select pre-programmed roast levels or manually adjust heat, fan speed, and drum rotation for custom flavors. Enjoy the process of creating your own exclusive coffee roasts.

**Highlights:** Bluetooth connectivity, Pre-programmed roast settings, Manual roast parameter adjustment, Heat control, Fan speed control, Drum rotation control

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP subscription | $4.99 | per month |


### Coffee DTR Timer

[App page](https://appshunter.io/ios/app/coffee-dtr-timer/id6749510887)

This app helps coffee roasters time their roasts accurately. It allows users to input roaster, bean, and weight details, then track key stages like yellowing and first crack. The timer calculates development time, weight loss, and provides a roast summary for logging.

**Highlights:** Roast stage timing (Yellowing, First Crack, Drop), Live Development Time (DTR) calculation, Weight loss calculation, Roast history logging, Favorite and delete roasts, Custom roaster and bean input

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sandbox Smart free?

Sandbox Smart is free to download, with in-app purchases available.

### Is Coffee DTR Timer free?

Coffee DTR Timer is free to download, with no in-app purchases.

### Do Sandbox Smart or Coffee DTR Timer have ads?

Neither Sandbox Smart nor Coffee DTR Timer shows ads.

### Which is updated more often, Sandbox Smart or Coffee DTR Timer?

Sandbox Smart ships an update every 2 months, and Coffee DTR Timer every 9 days. Most recently, Sandbox Smart was updated on September 21, 2026 and Coffee DTR Timer on September 11, 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.*