Symphony by GeoStar vs ET2900
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Symphony by GeoStar
Control and monitor your geothermal comfort system remotely. View real-time system feedback, track energy usage, and receive alerts for maintenance. Access your entire geothermal system, not just the thermostat, from any internet-connected device.
- Remote system monitoring
- Real-time feedback
- Temperature and program control
- Energy usage tracking
- Equipment alerts and reminders
- Cloud-based access
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Symphony is a WiFi enabled comfort platform that’s unsurpassed in its ease of use, features and capabilities. It provides detailed system feedback in real-time and the tools to control it. Symphony marries the Aurora controls of your Geostar geothermal unit with the Aurora Weblink router, providing access to your equipment from practically anywhere. Symphony is cloud-based so there’s no software to install and provides control over your entire geothermal system - not just the thermostat as in other ‘smart thermostat’ systems. Symphony allows you to: • View and control your geothermal system’s operation from anywhere using a laptop, smart phone or tablet using an intuitive dashboard for quick access to your unit’s status, operation history, alert history, and energy usage. • Remotely control temperatures and programs for up to 6 zones (requires the IntelliZone2 zoning system). • Observe and track your unit’s energy use for the last 13 months. • Provide equipment performance data to dealers for remote monitoring and diagnosis. • Receive equipment alerts and service reminders (as well as your dealer) via email and texts.
ET2900
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ET2900 is suitable for technicians and consumers. It is safe to use with its anti-heat characteristics and prevention against backfire electrical sparks that can occur during electrical system diagnosis. Function supported: 1. Battery Health Test 2. Start System Test 3. Charging System Test 4. Test Report Applicable battery types: 12V(Lead-acid battery, GEL battery and AGM battery) Supported battery standards: CCA、BCI、CA、MCA、JIS、DIN、IEC、EN、SAE、GB Support model: Mac Tools ET2900 Bluetooth Battery Clamps Mac Tools ET1600 Elite Code Reader
Screenshots
Verdict
The clearest difference is update cadence: ET2900 at every 10 days against Symphony by GeoStar's every 2 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Symphony by GeoStar ships an update every 2 months, ET2900 every 10 days. The most recent releases landed on September 10, 2026 and May 17, 2026 respectively.
| Parameter | Symphony by GeoStar | ET2900 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (4 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 17 MB | 50 MB |
| Age rating | 4+ | 17+ |
| Developer | WaterFurnace International, Inc. | Launch Tech Co., Ltd |
In-app purchases
Symphony by GeoStar
No in-app purchases
ET2900
No in-app purchases









