# Solar Calibrator vs Deye ESS

The clearest difference is price: Deye ESS at Free against Solar Calibrator's $9.99. Deye ESS also leads on update cadence (every 11 days vs every 10 months) and iOS requirement (13.0 vs 15.1). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Deye ESS is free to download; Solar Calibrator costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Solar Calibrator against 5.0 for Deye ESS. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Solar Calibrator ships an update every 10 months, Deye ESS every 11 days. The most recent releases landed on November 12, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Solar Calibrator | Deye ESS |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/solar-calibrator/id1636630984/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/deye-ess/id6746040947/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 11 days** |
| Monetization | Paid | **Free** |
| Size | 40 MB | 103 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Fawzi Fakhro](https://appshunter.io/developer/1636630986) | [萃绩科技(上海)有限公司](https://appshunter.io/developer/1738188942) |

## What reviewers say

### Solar Calibrator

[App page](https://appshunter.io/ios/app/solar-calibrator/id1636630984)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Deye ESS

[App page](https://appshunter.io/ios/app/deye-ess/id6746040947)

Manage your power station equipment throughout its lifecycle with real-time monitoring, efficient O&M features, and smart revenue calculations. Access nationwide electricity prices to optimize operations and maximize ROI.

**Highlights:** Full lifecycle equipment management, All-in-one O&M with fault diagnosis, Real-time equipment monitoring, Smart revenue calculator, Nationwide electricity price lookup

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Solar Calibrator free?

Solar Calibrator costs $9.99, with no in-app purchases.

### Is Deye ESS free?

Deye ESS is free to download, with no in-app purchases.

### Which has better reviews, Solar Calibrator or Deye ESS?

Solar Calibrator and Deye ESS are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Solar Calibrator or Deye ESS have ads?

Neither Solar Calibrator nor Deye ESS shows ads.

### Which is updated more often, Solar Calibrator or Deye ESS?

Solar Calibrator ships an update every 10 months, and Deye ESS every 11 days. Most recently, Solar Calibrator was updated on November 12, 2026 and Deye ESS on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*