# OBGYNRx vs Diaper Tracker

The clearest difference is in-app purchases: OBGYNRx at none against Diaper Tracker's 3. OBGYNRx also leads on update cadence (weekly vs every 4 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Diaper Tracker sells 3 in-app purchases, starting at $3.99 per 7 days. OBGYNRx asks for nothing beyond the download.

OBGYNRx ships an update weekly, Diaper Tracker every 4 months. The most recent releases landed on October 11, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | OBGYNRx | Diaper Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Size | 126 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [OBGYNRX](https://appshunter.io/developer/1836384716) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### OBGYNRx

[App page](https://appshunter.io/ios/app/obgynrx/id6751713784)

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

**In-app purchases:** none


### Diaper Tracker

[App page](https://appshunter.io/ios/app/diaper-tracker-nappy-log/id6772260279)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rash Diary Weekly | $3.99 | per 7 days |
| Baby Chart Yearly | $19.99 | per year |
| CSV Export Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is OBGYNRx free?

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

### Is Diaper Tracker free?

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

### Do OBGYNRx or Diaper Tracker have ads?

Neither OBGYNRx nor Diaper Tracker shows ads.

### Which is updated more often, OBGYNRx or Diaper Tracker?

OBGYNRx ships an update weekly, and Diaper Tracker every 4 months. Most recently, OBGYNRx was updated on October 11, 2026 and Diaper Tracker on October 20, 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.*