# Solar Holler vs Fourth Step Inventory

The clearest difference is update cadence: Solar Holler at every 3 days against Fourth Step Inventory's every 4 months. Solar Holler also leads on iOS requirement (14.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Solar Holler ships an update every 3 days, Fourth Step Inventory every 4 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Solar Holler | Fourth Step Inventory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 months |
| Size | 8 MB | 2 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Solar Holler](https://appshunter.io/developer/1775349045) | [STEVEN MARC GORLIN](https://appshunter.io/developer/1867594003) |

## What reviewers say

### Solar Holler

[App page](https://appshunter.io/ios/app/solar-holler/id6737216524)

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

**In-app purchases:** none


### Fourth Step Inventory

[App page](https://appshunter.io/ios/app/fourth-step-inventory/id6757550299)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Holler free?

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

### Is Fourth Step Inventory free?

Fourth Step Inventory is free to download, with no in-app purchases.

### Do Solar Holler or Fourth Step Inventory have ads?

Neither Solar Holler nor Fourth Step Inventory shows ads.

### Which is updated more often, Solar Holler or Fourth Step Inventory?

Solar Holler ships an update every 3 days, and Fourth Step Inventory every 4 months. Most recently, Solar Holler was updated on October 25, 2026 and Fourth Step Inventory 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.*