# Mod Solar vs Kilnshrink

The clearest difference is price: Mod Solar at Free against Kilnshrink's $3.99. Kilnshrink's advantage is in-app purchases (none vs 2). On update cadence, ads, device support and iOS requirement there is nothing between them.

Mod Solar is free to download; Kilnshrink costs $3.99 up front. Mod Solar sells 2 in-app purchases, starting at $0.99 per 7 days. Kilnshrink asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mod Solar | Kilnshrink |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 5 MB | 31 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Savio Colombo](https://appshunter.io/developer/1840266069) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## What reviewers say

### Mod Solar

[App page](https://appshunter.io/ios/app/mod-solar-panel-project/id6763965089)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Monthly Subscription | $2.99 | per month |


### Kilnshrink

[App page](https://appshunter.io/ios/app/kilnshrink/id6777078165)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mod Solar free?

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

### Is Kilnshrink free?

Kilnshrink costs $3.99, with no in-app purchases.

### Do Mod Solar or Kilnshrink have ads?

Neither Mod Solar nor Kilnshrink shows ads.

### Which is updated more often, Mod Solar or Kilnshrink?

Mod Solar ships an update weekly, and Kilnshrink weekly. Most recently, Mod Solar was updated on September 14, 2026 and Kilnshrink on September 21, 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.*