# Sinus ID vs Ibai Plus

The clearest difference is price: Ibai Plus at Free against Sinus ID's $4.99. Ibai Plus also leads on update cadence (every 7 months vs every 40 months). Sinus ID's advantage is iOS requirement (11.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Ibai Plus 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, Ibai Plus every 7 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Sinus ID | Ibai Plus |
| --- | --- | --- |
| 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 | **Every 7 months** |
| Monetization | Paid | — |
| Size | 47 MB | 46 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) | [The Members](https://appshunter.io/developer/1653824858) |

## 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


### Ibai Plus

[App page](https://appshunter.io/ios/app/ibai-plus/id6499083477)

**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 Ibai Plus free?

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

### Do Sinus ID or Ibai Plus have ads?

Neither Sinus ID nor Ibai Plus shows ads.

### Which is updated more often, Sinus ID or Ibai Plus?

Sinus ID ships an update every 40 months, and Ibai Plus every 7 months. Most recently, Sinus ID was updated on October 7, 2026 and Ibai Plus on October 1, 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.*