# Trainventory vs Filament

The clearest difference is update cadence: Filament at every 3 days against Trainventory's every 4 months. Trainventory's advantage is iOS requirement (18.6 vs 26.0). 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.

Trainventory ships an update every 4 months, Filament every 3 days. The most recent releases landed on September 11, 2026 and August 9, 2026 respectively.

## The numbers

| Metric | Trainventory | Filament |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (20 ratings)](https://appshunter.io/ios/app/trainventory/id6738597502/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 29 MB | 14 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Eby](https://appshunter.io/developer/380053295) | [David Oreol](https://appshunter.io/developer/1892872687) |

## What reviewers say

### Trainventory

[App page](https://appshunter.io/ios/app/trainventory/id6738597502)

Organize, track the value of, and create wishlists for your model train collection. Get reminders for new releases and manage your hobby efficiently.

**Highlights:** Organize train collection, Track costs and value, Create wishlists, Wishlist reminders, User-friendly design

**In-app purchases:** none


### Filament

[App page](https://appshunter.io/ios/app/filament-tracker/id6762094669)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Trainventory free?

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

### Is Filament free?

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

### Do Trainventory or Filament have ads?

Neither Trainventory nor Filament shows ads.

### Which is updated more often, Trainventory or Filament?

Trainventory ships an update every 4 months, and Filament every 3 days. Most recently, Trainventory was updated on September 11, 2026 and Filament on August 9, 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.*