# Installation and Maintenance vs Solar Setup

The clearest difference is in-app purchases: Installation and Maintenance at none against Solar Setup's 1. Solar Setup's advantage is update cadence (every 2 days vs every 16 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Installation and Maintenance ships an update every 16 months, Solar Setup every 2 days. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Installation and Maintenance | Solar Setup |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 30 MB | 46 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ION Telecom and Technology LLC](https://appshunter.io/developer/1541129607) | [Ammar Khatib](https://appshunter.io/developer/1613990135) |

## What reviewers say

### Installation and Maintenance

[App page](https://appshunter.io/ios/app/installation-and-maintenance/id6473689299)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Installation and Maintenance free?

Installation and Maintenance is free to download, with no in-app purchases.

### Is Solar Setup free?

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

### Do Installation and Maintenance or Solar Setup have ads?

Neither Installation and Maintenance nor Solar Setup shows ads.

### Which is updated more often, Installation and Maintenance or Solar Setup?

Installation and Maintenance ships an update every 16 months, and Solar Setup every 2 days. Most recently, Installation and Maintenance was updated on November 4, 2026 and Solar Setup on October 25, 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.*