# PHID for Students vs Nausea & Vomiting Tracker

The clearest difference is in-app purchases: PHID for Students at none against Nausea & Vomiting Tracker's 2. Nausea & Vomiting Tracker's advantage is update cadence (every 3 months vs every 62 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Nausea & Vomiting Tracker sells 2 in-app purchases, starting at $4.99 per month. PHID for Students asks for nothing beyond the download.

PHID for Students ships an update every 62 months, Nausea & Vomiting Tracker every 3 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PHID for Students | Nausea & Vomiting Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/phid-for-students/id1116560161/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 62 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 21 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Stanley Ho Centre for Emerging Infectious Diseases. The Chinese University of Hong Kong.](https://appshunter.io/developer/1116560160) | [Muddusir Ayaz](https://appshunter.io/developer/1891330339) |

## What reviewers say

### PHID for Students

[App page](https://appshunter.io/ios/app/phid-for-students/id1116560161)

This app serves as a handy manual for infectious diseases, specifically tailored for public health, nursing, and medical students. It offers a public health perspective, filling a gap in bio-medically focused resources and providing locally relevant material.

**Highlights:** Infectious disease manual, Public health perspective, Locally relevant resources, For students, Handy reference

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

**In-app purchases:** none


### Nausea & Vomiting Tracker

[App page](https://appshunter.io/ios/app/nausea-and-vomiting-tracker/id6781822460)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nausea & Vomiting OS Monthly | $4.99 | per month |
| Nausea & Vomiting OS Annual | $29.99 | per year |


## Frequently asked questions

### Is PHID for Students free?

PHID for Students is free to download, with no in-app purchases.

### Is Nausea & Vomiting Tracker free?

Nausea & Vomiting Tracker is free to download, with in-app purchases available.

### Do PHID for Students or Nausea & Vomiting Tracker have ads?

Neither PHID for Students nor Nausea & Vomiting Tracker shows ads.

### Which is updated more often, PHID for Students or Nausea & Vomiting Tracker?

PHID for Students ships an update every 62 months, and Nausea & Vomiting Tracker every 3 months. Most recently, PHID for Students was updated on November 2, 2026 and Nausea & Vomiting Tracker on October 31, 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.*