# GunBase vs Isochron

The clearest difference is price: Isochron at Free against GunBase's $39.99. GunBase's advantage is update cadence (every 3 days vs every 6 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Isochron is free to download; GunBase costs $39.99 up front. GunBase sells 4 one-off in-app purchases and Isochron sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

GunBase ships an update every 3 days, Isochron every 6 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | GunBase | Isochron |
| --- | --- | --- |
| Price | $39.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gunbase/id6760922772/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 weeks |
| Monetization | Paid | — |
| Size | 8 MB | 4 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Benjamin Richter](https://appshunter.io/developer/1880818211) | [Seth Adam Mundall](https://appshunter.io/developer/1626079549) |

## What reviewers say

### GunBase

[App page](https://appshunter.io/ios/app/gunbase/id6760922772)

Manage and track your personal firearms collection with this app. Catalog items with photos, search and filter by various criteria, and view detailed item pages. It offers secure authentication and encrypted data storage, connecting to your personal server for privacy.

**Highlights:** Catalog firearms with photo thumbnails, Search by make, model, serial number, or notes, Filter by type, caliber, NFA status, and condition, Detailed item pages with photo galleries, Dashboard with collection count and value, Secure authentication and encrypted data storage

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Magazine | $4.99 | one-time |
| Box | $9.99 | one-time |
| Case | $19.99 | one-time |
| Ammo Can | $49.99 | one-time |


### Isochron

[App page](https://appshunter.io/ios/app/isochron-watch-accuracy/id6780989450)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Isochron Pro | $9.99 | one-time |


## Frequently asked questions

### Is GunBase free?

GunBase costs $39.99, and also offers in-app purchases.

### Is Isochron free?

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

### Do GunBase or Isochron have ads?

Neither GunBase nor Isochron shows ads.

### Which is updated more often, GunBase or Isochron?

GunBase ships an update every 3 days, and Isochron every 6 weeks. Most recently, GunBase was updated on November 9, 2026 and Isochron 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.*