Sandbox Smart vs Coffee DTR Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sandbox Smart
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.
- Bluetooth connectivity
- Pre-programmed roast settings
- Manual roast parameter adjustment
- Heat control
- Fan speed control
- Drum rotation control
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The smart home coffee bean roaster Sandbox Smart R1 connects smartphones with Bluetooth. The app comes with pre-programmed roast settings to make different roast levels: Light/Medium/Dark Roast for users to utilize and also manual settings to adjust roast parameters: Heat/Fan-speed/Drum Rotations Control for users to enjoy the fun of roasting their own exclusive flavors. Your coffee, your choice. http://www.sandboxsmart.com Apple Terms of Use (EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Coffee DTR Timer
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.
- 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
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This simple coffee roast timer is used with your roaster of choice. Add your roaster name, bean name and green weight with units on the setup screen. On the timer screen hit start when you start your roast. Tap the Yellowing button when the beans start to turn yellow and the drying phase time is saved. Tap First Crack at the sound of first crack and the Maillard phase time is saved and live DTR is enabled allowing to dial in development time! Tap Drop/End and the development time along with DTR, maillard time, time to first crack and total roast time are shown to allow you to log your roast information. Add roasted weight and weight loss is calculated. Save roast will add to roast history and display the roast summary screen. On the history screen the user can favorite or delete roasts from the history.
Screenshots
Verdict
The clearest difference is review sentiment: Coffee DTR Timer at 100% against Sandbox Smart's 33%. Coffee DTR Timer also leads on rating (4.8 vs 2.6) and in-app purchases (none vs 1). Sandbox Smart's advantage is iOS requirement (12.0 vs 18.5). On price, ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
Coffee DTR Timer holds the better App Store score, 4.8 against 2.6. Both are backed by a comparable volume of ratings — 7 and 6 respectively. Written reviews point the same way: 33% of Sandbox Smart's written reviews are positive against 100% of Coffee DTR Timer's.
Sandbox Smart ships an update every 2 months, Coffee DTR Timer every 9 days. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Sandbox Smart | Coffee DTR Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (7 ratings) | 4.8 (6 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 7 — better | 6 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 93 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Sandbox Smart Technology Co., Ltd. | Mike Whaley |
Customer experience
Sandbox Smart
Coffee DTR Timer
In-app purchases
Sandbox Smart
- VIP subscription$4.991 Month
Coffee DTR Timer
No in-app purchases
Questions
Is Sandbox Smart free?
Is Coffee DTR Timer free?
Which has better reviews, Sandbox Smart or Coffee DTR Timer?
Do Sandbox Smart or Coffee DTR Timer have ads?
Which is updated more often, Sandbox Smart or Coffee DTR Timer?
Other comparisons
