Perfect OB Wheel

Name: Perfect OB Wheel
Price: 1.99 USD
Rating: 4.9 (3545 reviews)
Author: Evan Schoenberg

By: Evan Schoenberg

Obstetrics calculator

Features & Capabilities

Perfect OB Wheel is a fast, thorough obstetrics calculator for pregnancy planning. It supports multiple input methods—LMP, conception date, EDC, and ultrasound dating—and lets you enter data via a numeric keypad or a bottom date wheel for rapid results.

The app delivers comprehensive results, including Estimated Due Date, LMP, Conception Date, 1st and 2nd Trimester End Dates, Gestational Age, Conceptional Age, and estimated fetal length and weight. Results are shown relative to today by default and can be quickly updated to any date. The tool also remembers your last inputs for streamlined workflows. An optional upgrade, Perfect OB Tracker, enables multi-pregnancy tracking, notes, postpartum tracking, and HIPAA-friendly passcode locking for privacy.”

User Growth & Download Statistics

App Education Privacy & Security

By:

Evan Schoenberg

Rating:

4.90

(3,545) 3 new ratings

Version:

58 Last updated: 2021-10-16

Version code:

844735500

Creation date:

2008-10-16

Compatible devices:

Size:

9.67MB

Price:

1.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 30,815 ▼ 111

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Evan Schoenberg

Apple Apps Store

https://apps.apple.com/us/app/perfect-ob-wheel/id293656711

Website:

http://www.perfectobwheel.com

User Reviews

Users praise ease of use, speed, and the app's comprehensive, adaptable dating calculations with saved client data, making it a staple in OB practice. Major drawbacks cited are pricing with hidden add-ons, potential dating accuracy issues and lack of cycle-length adjustment, stability problems after updates causing crashes, and readability changes. Some request more infant-data fields. Overall it’s a widely used, trusted tool with a few usability and accuracy caveats.

Pros

Very easy to use and user-friendly interface.
Flexible, fast dating calculations from multiple inputs (LMP, EDD, GA) with data-saving features.
Indispensable in daily OB practice; saves time and helps prevent lost wheels.
Widely used and trusted by nurses, midwives, and physicians; highly recommended.
Notable credibility in the field (mentioned in Green Journal).

Cons

Pricing and hidden/extra in-app purchases beyond base price (base $1.99, then $4.99 for full features).
Dating accuracy concerns (trimester dating off, disagreement with ACOG criteria) and lack of cycle-length adjustment leading to date discrepancies.
Stability issues after updates; crashes or the app won’t open and can disappear after updates.
Readability issues due to smaller font.
Requests for more infant-data fields and additional customization (e.g., cycle-length, APGAR, weight).

Recent reviews

I love this app. It’s easy to use.

by El*****, 2026-03-10

I am a nurse in a prenatal clinic and use this multiple times a day. So convenient having everything in one place whether you start with last menstrual period, estimated due date or gestational age, It all works quickly and flawlessly.