# iSolar vs PV Calculator

The clearest difference is ads: PV Calculator at none against iSolar's shown. PV Calculator also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). iSolar's advantage is update cadence (fortnightly vs every 8 months) and price ($0.99 vs $1.99). On in-app purchases there is nothing between them.

iSolar costs $0.99 and PV Calculator $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSolar ships an update fortnightly, PV Calculator every 8 months. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | iSolar | PV Calculator |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | — | **[4.0 (13 ratings)](https://appshunter.io/ios/app/pv-calculator-off-grid/id1219643642/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 42.9% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 8 months |
| Monetization | — | Paid |
| Size | 9 MB | 15 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alain Lima](https://appshunter.io/developer/789421888) | [Cristinel Bontas](https://appshunter.io/developer/645866051) |

## 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


### PV Calculator

[App page](https://appshunter.io/ios/app/pv-calculator-off-grid/id1219643642)

This tool helps you calculate the necessary components for an off-grid photovoltaic system. It guides you through determining power consumption, available sunlight, and sizing solar arrays and battery banks.

**Highlights:** Battery bank sizing, Solar panel wattage calculation, Charge controller sizing, Power consumption determination, Sun hours analysis

**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 PV Calculator free?

PV Calculator costs $1.99, with no in-app purchases.

### Do iSolar or PV Calculator have ads?

iSolar shows ads; PV Calculator does not.

### Which is updated more often, iSolar or PV Calculator?

iSolar ships an update fortnightly, and PV Calculator every 8 months. Most recently, iSolar was updated on October 9, 2026 and PV Calculator on October 24, 2026.

---

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