Preg Wheel vs CritiCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Preg Wheel
This app provides a digital pregnancy wheel for iPhone users, eliminating the need for a physical one. It allows for quick input of key dates and offers accurate results, accounting for calendar variations. The app also saves your information for future use and includes important dates for screenings throughout the pregnancy.
- Input LMP, EDD, EGA, and IVF dates
- Accurate date calculations with leap year support
- Save and restore input dates
- Track important screening test dates
- View dates for 1st Trimester US, CVS, Quad Screen, and more
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Simple and fast pregnancy wheel available for the iPhone, No need to carry a paper wheel. The best part is the app is completely free. Features ------------------------------- 1) Quickly input various dates with the date wheel: • Last menstrual period (LMP) • Estimated date of delivery (EDD) • Estimated Gestational Age (EGA) • IVF dates 2) Accurate results: Preg Wheel provides exact dates and accounts for all calendar variance, including leap years. 3) Persistence: Preg Wheel can save the date and date type and restore them when launched to streamline your workflow. 4) Now with even more relevant dates for the entire pregnancy. Know in advance when specific screening tests need to be performed. • 1st Trimesters US • CVS • Quad Screen • Amino • Anatomy US • GTT • Anti-D Prophylaxis • GBS Screen • Elective Delivery
CritiCalc
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Simple tool for calculating a variety of transport medicine problems. This is not a tool for self-diagnosis and is meant to aid medical professionals that have been trained in these tools. Please seek medical help from a doctor as these tools in isolation are insufficient to provide medical advice. If you are a medical provider, please cross reference local policies, protocols, and training. No guarantee is provided to the accuracy of these tools.
Screenshots
Verdict
The clearest difference is update cadence: CritiCalc at every 2 weeks against Preg Wheel's every 9 months. Preg Wheel's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Preg Wheel ships an update every 9 months, CritiCalc every 2 weeks. The most recent releases landed on June 9, 2026 and September 13, 2026 respectively.
| Parameter | Preg Wheel | CritiCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (62 ratings) — better | — |
| Positive reviews | 58.6% of reviews | — |
| Number of ratings | 62 — better | — |
| Update frequency | Every 9 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 10.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 24 MB | 53 MB |
| Age rating | 17+ | 17+ |
| Developer | Andrew Yu | Jason Richmond |
In-app purchases
Preg Wheel
No in-app purchases
CritiCalc
No in-app purchases
