# Solar Setup vs SunStem

The clearest difference is in-app purchases: SunStem at none against Solar Setup's 1. Solar Setup's advantage is update cadence (every 2 days vs weekly) and iOS requirement (14.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Solar Setup sells 1 one-off in-app purchase. SunStem asks for nothing beyond the download.

Solar Setup ships an update every 2 days, SunStem weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Solar Setup | SunStem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/solar-setup-off-grid-calc/id6771114823/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Freemium | — |
| Size | 46 MB | 7 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ammar Khatib](https://appshunter.io/developer/1613990135) | [Dmitriy Motorin](https://appshunter.io/developer/1495533596) |

## What reviewers say

### Solar Setup

[App page](https://appshunter.io/ios/app/solar-setup-off-grid-calc/id6771114823)

Effortlessly plan your off-grid solar system. This tool calculates panel, battery, and inverter needs based on your location, power usage, and desired backup days, providing cost and payback estimates.

**Highlights:** Off-grid solar sizing, Appliance catalog, Real sun-hours data, Battery science calculations, Inverter surge load handling, Cost and payback estimates, Save and compare setups

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solar Setup Pro | $6.99 | one-time |


### SunStem

[App page](https://appshunter.io/ios/app/sunstem-solar-calculator/id6787007719)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Solar Setup free?

Solar Setup is free to download, with in-app purchases available.

### Is SunStem free?

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

### Do Solar Setup or SunStem have ads?

Neither Solar Setup nor SunStem shows ads.

### Which is updated more often, Solar Setup or SunStem?

Solar Setup ships an update every 2 days, and SunStem weekly. Most recently, Solar Setup was updated on November 5, 2026 and SunStem on October 31, 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.*