Esolar+ vs RMS Delta
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Esolar+
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This app is a free platform. Once you have the Esolar system, you can monitor and optimize your energy use 24/7. It provides you with a comprehensive view of the energy ecosystem. You can view the direction of energy flow and know whether the energy currently used is from photovoltaic, power grid or battery. You can view the real-time power of PV, system, power grid and battery anytime and anywhere. View the load power consumption and revenue, and set the distribution of electricity price for one day. We provide a variety of operation modes for you to choose from, and optimize the use of energy and save money by setting your electricity preferences.
RMS Delta
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Tekelek, a Rochester Sensors company, is proud to offer data portal to optimize the benefits and ROI from your tank monitoring program. Tekelek's Delta platform is a cost-effective, cloud-based, highly adaptable remote telemetry reporting platform. Our intuitive, secure and fully scalable Delta platform provides scheduled, bespoke reports from all of your monitored tanks. With the comprehensive Delta backend solution, you can access data remotely, 24/7, giving total control and visibility over all areas of your business, helping you monitor costs, optimize profits, improve service, maximize fill efficiency, increase operational efficiency, optimize route planning, increase productivity, eliminate run outs, and much more. Use your data to maximize the benefits for your business with Tekelek Delta β from the world leaders in tank level monitoring.
Screenshots
Verdict
The clearest difference is update cadence: RMS Delta at weekly against Esolar+'s every 3 months. Esolar+'s advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Esolar+ ships an update every 3 months, RMS Delta weekly. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.
| Parameter | Esolar+ | RMS Delta |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Weekly β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod β better |
| Requires iOS | 13.0 β better | 15.0 |
| Further details β not scored | ||
| Size | 90 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | ESY Sunhome Co., Ltd | Rochester Sensors, LLC |
In-app purchases
Esolar+
No in-app purchases
RMS Delta
No in-app purchases









