# PrepVault vs GridDown

The clearest difference is in-app purchases: GridDown at none against PrepVault's 3. PrepVault's advantage is update cadence (every 3 weeks vs every 6 months) and iOS requirement (15.1 vs 26.5). On price, ads and device support there is nothing between them.

Both are free to download. PrepVault sells 3 in-app purchases, starting at $1.99 per month. GridDown asks for nothing beyond the download.

PrepVault ships an update every 3 weeks, GridDown every 6 months. The most recent releases landed on November 5, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PrepVault | GridDown |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Size | 39 MB | 6 MB |
| Requires iOS | **15.1** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pau Esmerats](https://appshunter.io/developer/1880454830) | [YOURFULLSTACK, LLC](https://appshunter.io/developer/363434825) |

## What reviewers say

### PrepVault

[App page](https://appshunter.io/ios/app/prepvault-survival-inventory/id6759740647)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tactical - Monthly | $1.99 | per month |
| Operational — Annual | $14.99 | per year |
| Bunker Mode — Lifetime | $29.99 | one-time |


### GridDown

[App page](https://appshunter.io/ios/app/griddown/id6760301965)

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

**In-app purchases:** none


## Frequently asked questions

### Is PrepVault free?

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

### Is GridDown free?

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

### Do PrepVault or GridDown have ads?

Neither PrepVault nor GridDown shows ads.

### Which is updated more often, PrepVault or GridDown?

PrepVault ships an update every 3 weeks, and GridDown every 6 months. Most recently, PrepVault was updated on November 5, 2026 and GridDown on October 28, 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.*