# Tropion vs TruLab Sample Tracker

The clearest difference is update cadence: TruLab Sample Tracker at every 2 months against Tropion's every 5 months. Tropion's advantage is iOS requirement (12.4 vs 15.1). 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.

Tropion ships an update every 5 months, TruLab Sample Tracker every 2 months. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Tropion | TruLab Sample Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (11 ratings)](https://appshunter.io/ios/app/trulab-sample-tracker/id6443908394/reviews)** |
| Number of ratings | — | **11** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 23 MB | 66 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Snapiot Inc](https://appshunter.io/developer/1457387084) | [TruLab, Inc.](https://appshunter.io/developer/1533473451) |

## What reviewers say

### Tropion

[App page](https://appshunter.io/ios/app/tropion-lung01/id1543020065)

**Features:** macOS Compatibility

**In-app purchases:** none


### TruLab Sample Tracker

[App page](https://appshunter.io/ios/app/trulab-sample-tracker/id6443908394)

This application simplifies the management of biological samples for clinical trials. It provides essential sample-level metadata, making tracking and organization straightforward for researchers and medical professionals.

**Highlights:** Biological sample metadata tracking, Clinical trial support, Easy-to-use interface, Sample-level data management

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

**In-app purchases:** none


## Frequently asked questions

### Is Tropion free?

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

### Is TruLab Sample Tracker free?

TruLab Sample Tracker is free to download, with no in-app purchases.

### Do Tropion or TruLab Sample Tracker have ads?

Neither Tropion nor TruLab Sample Tracker shows ads.

### Which is updated more often, Tropion or TruLab Sample Tracker?

Tropion ships an update every 5 months, and TruLab Sample Tracker every 2 months. Most recently, Tropion was updated on October 27, 2026 and TruLab Sample Tracker on October 22, 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.*