meterMate vs RRTool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
meterMate
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"MeterMate can control functions like recording, reading, deleting through Bluetooth connection, and draw up the curve of parameters like temperature, humidity, wet bulb so that the user can intuitively detect the parameters' trend. The alarm function can remind the user, which is both accurate and practical. When there is too much data storage, data can be shared to third parties, or the user can manually share under the file page. This application MeterMate must be used along with mini hygrothermograph of Shenzhen Huitianyi Electronics Co., Ltd."
RRTool
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RRTool is the extended features companion app to your RR1090 digital refractometer and similar Bay Area Instruments devices. It communicates via encrypted BLE with your device, mirroring its buttons and providing extended functionalities such as: cloud spreadsheet logging of your measurements, enabling of ATC for Brix, QR code generation and device firmware upgrades.
Screenshots
Verdict
The clearest difference is iOS requirement: meterMate at 11.0 against RRTool's 14.0. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
meterMate ships an update every 2 months, RRTool every 4 months. The most recent releases landed on September 10, 2026 and September 16, 2026 respectively.
| Parameter | meterMate | RRTool |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 6 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Jumaoyuan Science and Technology Co., Ltd. | Bay Area Instruments Inc. |
In-app purchases
meterMate
No in-app purchases
RRTool
No in-app purchases
