Solar Calibrator vs Energy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Calibrator
This professional toolkit helps PV installers precisely calibrate panel angles, size battery banks and wire gauges, and generate PDF quotes. It includes tools for obstruction analysis and load auditing, all accessible offline.
- Solar compass and tilt angle calibration
- Battery and inverter sizing
- Wire gauge calculation
- Load audit and quote builder
- PV array and string sizing
- Obstruction analysis
- Offline functionality
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Solar Calibrator is a field toolkit for solar installers and serious DIYers. Set the tilt and direction, size the array, battery bank and cables, check strings and shading, then hand the customer a PDF quote, all from one app. One purchase. No ads, no subscription, no account. TILT ANGLE Lay your phone on the panel and use it as a digital level. Get the best year-round angle for your latitude from published formulas, plus seasonal angles for summer and winter, and which way the panels should face. ORIENTATION A smooth, damped compass that tells you when the array faces the equator: south in the northern hemisphere, north in the southern. PV ARRAY SIZING Enter monthly usage in kWh and the share of the bill you want to offset. Peak sun hours are estimated from your GPS location, so there is nothing to look up. You get system size in kW, number of panels and roof area needed. BATTERY BANK Size off-grid and backup storage from monthly usage, backup hours and system voltage. Lithium or lead-acid, with depth of discharge and efficiency built in. WIRE GAUGE Get the right cable size, in AWG and mm², from current, run length and system voltage, for copper or aluminum. It checks both current capacity and voltage drop, and tells you which one set the size. STRING SIZING Find the maximum panels in series without exceeding the inverter's voltage limit on the coldest morning, using panel Voc and temperature coefficient. Add Vmp and the MPPT minimum to get a full min–max range for hot days too. LOAD AUDIT List appliances with quick-add presets and realistic hours per day to get total daily consumption before you size anything. SHADING CHECK Enter the height of a tree or building and its distance to see whether it will shade the panels at the winter solstice, when the sun is lowest. QUOTES Build a customer quote on site: • Search a catalog of common solar parts or reuse recent items with their last price • Hardware and Other sections, with labor as a fixed amount or a % of hardware • Save quotes and reopen them later • Export a clean, professional PDF named after the customer and date BUILT FOR THE JOB • Every result shows the working behind the number • Export any calculation as a PDF report • Currency set from your region, or choose your own • 7 languages: English, Arabic, Hindi, Urdu, Spanish, French and Uzbek, with full right-to-left support • Dark mode for bright sun and dim attics Results are estimates for planning. Always follow local electrical codes and the equipment manufacturer's specifications.
Energy
Monitor your energy storage devices in real-time with this mobile application. It offers convenient and quick access to status information through clear data visualization and multi-dimensional displays of historical data.
- Real-time device status monitoring
- Data visualization with charts
- Historical data display
- Web access anytime, anywhere
- Low internet traffic usage
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Energy-Mate is a mobile terminal application software for intelligent monitoring of energy storage devices, which enables users to monitor the status information of energy storage devices in real time more conveniently and quickly. clever Data visualization, simple and understandable charts Wiser approach Display real-time and historical data on the web anytime and anywhere rich Multi-dimensional display of real-time and historical data Salvation The traffic generated by the Internet is small, fast and does not occupy a large amount of traffic.
Screenshots
Verdict
The clearest difference is price: Energy at Free against Solar Calibrator's $9.99. Energy also leads on update cadence (every 4 weeks vs every 10 months) and ratings volume (13 vs 2). Solar Calibrator's advantage is rating (5.0 vs 4.2) and review sentiment (100% vs 80%). On ads, in-app purchases, device support and iOS requirement 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
Energy is free to download; Solar Calibrator costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Solar Calibrator holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Energy has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Solar Calibrator's written reviews are positive against 80% of Energy's.
Solar Calibrator ships an update every 10 months, Energy every 4 weeks. The most recent releases landed on November 12, 2026 and November 7, 2026 respectively.
| Parameter | Solar Calibrator | Energy |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | 4.2 (13 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 2 | 13 — better |
| Update frequency | Every 10 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 40 MB | 182 MB |
| Age rating | 4+ | 4+ |
| Developer | Fawzi Fakhro | 祥梯 孟 |
Customer experience
Solar Calibrator
Energy
In-app purchases
Solar Calibrator
No in-app purchases
Energy
No in-app purchases









