# Obstetrics Calculator vs CPS App

The clearest difference is in-app purchases: CPS App at none against Obstetrics Calculator's 2. CPS App also leads on ads (none vs shown). Obstetrics Calculator's advantage is update cadence (every 2 months vs every 45 months) and iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. Obstetrics Calculator sells 2 in-app purchases, starting at $1.99 per month. CPS App asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Obstetrics Calculator against 5.0 for CPS App. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Obstetrics Calculator ships an update every 2 months, CPS App every 45 months. The most recent releases landed on October 27, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Obstetrics Calculator | CPS App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/obstetrics-calculator/id1564764019/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cps-app/id1669942389/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 45 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 90 MB | 28 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Alexander Snegirev](https://appshunter.io/developer/1564764021) | [Caja Petrolera de Salud](https://appshunter.io/developer/1667547507) |

## What reviewers say

### Obstetrics Calculator

[App page](https://appshunter.io/ios/app/obstetrics-calculator/id1564764019)

This medical app provides a comprehensive suite of tools for calculating gestational age, estimated due dates, and various risk assessments related to pregnancy and women's health. It includes calculators for maternity leave, cervical assessments, and cancer risk estimations, designed for healthcare professionals.

**Highlights:** Gestational age and due date calculation, Multiple calculation methods (LMP, ultrasound, IVF), Maternity leave timeframe estimation, Bishop Score and TOLAC probability, Cancer risk estimations (Breast, Cervical, Ovarian), Follow-up after colposcopy

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ObCalc Pro | $1.99 | per month |
| Disable Ads | $10.99 | one-time |


### CPS App

[App page](https://appshunter.io/ios/app/cps-app/id1669942389)

This mobile application serves the insured population of the Caja Petrolera de Salud. It provides access to health services and information for members.

**Highlights:** Access health services, Information for insured population, Serves Caja Petrolera de Salud members

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

**In-app purchases:** none


## Frequently asked questions

### Is Obstetrics Calculator free?

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

### Is CPS App free?

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

### Which has better reviews, Obstetrics Calculator or CPS App?

Obstetrics Calculator and CPS App are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Obstetrics Calculator or CPS App have ads?

Obstetrics Calculator shows ads; CPS App does not.

### Which is updated more often, Obstetrics Calculator or CPS App?

Obstetrics Calculator ships an update every 2 months, and CPS App every 45 months. Most recently, Obstetrics Calculator was updated on October 27, 2026 and CPS App on October 16, 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.*