# iSolar vs Solar Calibrator

The clearest difference is price: iSolar at $0.99 against Solar Calibrator's $9.99. iSolar also leads on update cadence (fortnightly vs every 11 months). Solar Calibrator's advantage is ads (none vs shown) and iOS requirement (15.1 vs 18.0). On in-app purchases and device support there is nothing between them.

iSolar costs $0.99 and Solar Calibrator $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSolar ships an update fortnightly, Solar Calibrator every 11 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iSolar | Solar Calibrator |
| --- | --- | --- |
| Price | **$0.99** | $9.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/solar-calibrator-pv-installer/id1636630984/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 11 months |
| Monetization | — | Paid |
| Size | 9 MB | 39 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alain Lima](https://appshunter.io/developer/789421888) | [Fawzi Fakhro](https://appshunter.io/developer/1636630986) |

## What reviewers say

### iSolar

[App page](https://appshunter.io/ios/app/isolar-install-solar-panel/id807174941)

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

**In-app purchases:** none


### Solar Calibrator

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


## Frequently asked questions

### Is iSolar free?

iSolar costs $0.99, with no in-app purchases.

### Is Solar Calibrator free?

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

### Do iSolar or Solar Calibrator have ads?

iSolar shows ads; Solar Calibrator does not.

### Which is updated more often, iSolar or Solar Calibrator?

iSolar ships an update fortnightly, and Solar Calibrator every 11 months. Most recently, iSolar was updated on November 1, 2026 and Solar Calibrator on November 3, 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.*