# Anti vs Sinus ID

The clearest difference is price: Anti at Free against Sinus ID's $4.99. Anti also leads on rating (3.0 vs 1.5) and update cadence (every 10 days vs every 40 months). Sinus ID's advantage is in-app purchases (none vs 1). On review sentiment, ratings volume, ads and device support there is nothing between them.

Anti is free to download; Sinus ID costs $4.99 up front. Anti sells 1 one-off in-app purchase. Sinus ID asks for nothing beyond the download.

Anti holds the better App Store score, 3.0 against 1.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Anti ships an update every 10 days, Sinus ID every 40 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | Anti | Sinus ID |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/anti-internet-addiction-timer/id651345628/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/sinus-id/id704828936/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 40 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 4 MB | 47 MB |
| Requires iOS | **8.3** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Masao Yamashita](https://appshunter.io/developer/651345791) | [Blue Tree Publishing, Inc.](https://appshunter.io/developer/496143325) |

## What reviewers say

### Anti

[App page](https://appshunter.io/ios/app/anti-internet-addiction-timer/id651345628)

This app helps users manage their smartphone usage by setting timed intervals for focused tasks and web browsing. It aims to prevent internet addiction and improve concentration on important activities.

**Highlights:** Dual timer for concentration and web browsing, Website selection for tracking, Activity history recording, Prevents internet addiction, Improves focus on tasks

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add on for Removing Ads | $0.99 | one-time |


### 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


## Frequently asked questions

### Is Anti free?

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

### Is Sinus ID free?

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

### Which has better reviews, Anti or Sinus ID?

Anti is rated higher. Anti averages 3.0 out of 5 from 2 ratings, while Sinus ID averages 1.5 from 2 ratings.

### Do Anti or Sinus ID have ads?

Neither Anti nor Sinus ID shows ads.

### Which is updated more often, Anti or Sinus ID?

Anti ships an update every 10 days, and Sinus ID every 40 months. Most recently, Anti was updated on October 23, 2026 and Sinus ID on October 23, 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.*