# Trace vs Allergense

The clearest difference is in-app purchases: Allergense at none against Trace's 5. Allergense also leads on ads (none vs shown) and rating (5.0 vs 4.6). Trace's advantage is ratings volume (28 vs 1) and device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Trace sells 5 in-app purchases, starting at $4.99 per 7 days. Allergense asks for nothing beyond the download.

Allergense holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Trace has 28 ratings behind it against 1, so its average is the more settled of the two.

Trace ships an update daily, Allergense every 2 days. The most recent releases landed on October 6, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Trace | Allergense |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (28 ratings)](https://appshunter.io/ios/app/trace-microplastics/id6740707486/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/allergense/id6801917573/reviews)** |
| Number of ratings | **28** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 2 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 84 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Control. Alt. Delete. LLC](https://appshunter.io/developer/1762687184) | [RAVI KOLTUR](https://appshunter.io/developer/6801917575) |

## What reviewers say

### Trace

[App page](https://appshunter.io/ios/app/trace-microplastics/id6740707486)

Understand your exposure to microplastics with a personalized assessment and science-backed recommendations. Learn about sources, track your progress, and make informed choices for a healthier life and a cleaner environment.

**Highlights:** Personalized microplastic exposure score, Customized reduction recommendations, Local tap water quality reports, Progress tracking over time, Educational content on microplastics, Actionable insights for daily life

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| premium weekly | $4.99 | per 7 days |
| premium weekly with trial | $4.99 | per 7 days |
| Subscription to Trace | $9.99 | per year |
| Trace Premium Yearly | $29.99 | per year |
| premium yearly | $29.99 | per year |


### Allergense

[App page](https://appshunter.io/ios/app/allergense/id6801917573)

This app provides real-time, community-sourced allergen safety information for restaurants. Users can see safety scores based on others with similar allergies, filter by specific allergens, and contribute their own reports to help others dine safely.

**Highlights:** Real-time safety map, Color-coded restaurant scores, Filter by specific allergens, Submit community reports, Read community reports, Search worldwide locations

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

**In-app purchases:** none


## Frequently asked questions

### Is Trace free?

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

### Is Allergense free?

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

### Which has better reviews, Trace or Allergense?

Allergense is rated higher. Trace averages 4.6 out of 5 from 28 ratings, while Allergense averages 5.0 from 1 ratings.

### Do Trace or Allergense have ads?

Trace shows ads; Allergense does not.

### Which is updated more often, Trace or Allergense?

Trace ships an update daily, and Allergense every 2 days. Most recently, Trace was updated on October 6, 2026 and Allergense on September 15, 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.*