# Sinus ID vs ERS 2025

The clearest difference is price: ERS 2025 at Free against Sinus ID's $4.99. ERS 2025 also leads on update cadence (fortnightly vs every 40 months). Sinus ID's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

ERS 2025 is free to download; Sinus ID costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sinus ID ships an update every 40 months, ERS 2025 fortnightly. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sinus ID | ERS 2025 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/sinus-id/id704828936/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 47 MB | 40 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [Material Apps EOOD](https://appshunter.io/developer/1489163433) |

## What reviewers say

### Sinus ID

[App page](https://appshunter.io/ios/app/sinus-id/id704828936)

Explore detailed 3D models and animations of sinus anatomy. Identify structures, visualize fluid flow, and use the drawing tools to annotate and share your findings. Ideal for students, patients, and medical professionals.

**Highlights:** 3D sinus anatomy models, Interactive structure identification, Normal and abnormal fluid flow animations, Two-finger zoom and pan, Drawing whiteboard with text and eraser, Screenshot and share functionality

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

**In-app purchases:** none


### ERS 2025

[App page](https://appshunter.io/ios/app/ers-2025/id6739964593)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sinus ID free?

Sinus ID costs $4.99, with no in-app purchases.

### Is ERS 2025 free?

ERS 2025 is free to download, with no in-app purchases.

### Do Sinus ID or ERS 2025 have ads?

Neither Sinus ID nor ERS 2025 shows ads.

### Which is updated more often, Sinus ID or ERS 2025?

Sinus ID ships an update every 40 months, and ERS 2025 fortnightly. Most recently, Sinus ID was updated on November 1, 2026 and ERS 2025 on October 25, 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.*