# ACOG DII SMI vs OB ToolBox

The clearest difference is update cadence: OB ToolBox at every 3 weeks against ACOG DII SMI's every 6 months. OB ToolBox also leads on iOS requirement (13.0 vs 18.0). ACOG DII SMI's advantage is ratings volume (158 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for ACOG DII SMI against 5.0 for OB ToolBox. That said, the two scores are not equally well evidenced: ACOG DII SMI has 158 ratings behind it against 2, so its average is the more settled of the two.

ACOG DII SMI ships an update every 6 months, OB ToolBox every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ACOG DII SMI | OB ToolBox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (158 ratings)](https://appshunter.io/ios/app/acog-dii-smi/id1220256973/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ob-toolbox/id1565667366/reviews)** |
| Number of ratings | **158** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 19 MB | 56 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Fountainhead Mobile Solutions](https://appshunter.io/developer/1113758990) | [Frederick Blair](https://appshunter.io/developer/1565667368) |

## What reviewers say

### ACOG DII SMI

[App page](https://appshunter.io/ios/app/acog-dii-smi/id1220256973)

This app provides access to materials from the Safe Motherhood Initiative, a project focused on improving maternal care in New York State. It offers resources like risk assessment tables, checklists, algorithms, and clinical slide decks to address leading causes of maternal mortality and venous thromboembolism.

**Highlights:** Risk assessment tables, Checklists, Algorithms, Clinical presentation slide decks, Guidance documents

**Features:** Vision Pro support

**In-app purchases:** none


### OB ToolBox

[App page](https://appshunter.io/ios/app/ob-toolbox/id1565667366)

This app offers a quick reference for essential medical values related to fetal growth, amniotic fluid, and Doppler indices. It includes calculators for preterm birth prediction, cesarean risk, and risk of stillbirth or miscarriage.

**Highlights:** Fetal growth reference values, Estimated fetal weight calculator, Amniotic fluid and Doppler indices, Bishop score reference, Preterm birth predictor, Cesarean risk calculator, Stillbirth and miscarriage risk calculators

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

**In-app purchases:** none


## Frequently asked questions

### Is ACOG DII SMI free?

ACOG DII SMI is free to download, with no in-app purchases.

### Is OB ToolBox free?

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

### Which has better reviews, ACOG DII SMI or OB ToolBox?

OB ToolBox is rated higher. ACOG DII SMI averages 5.0 out of 5 from 158 ratings, while OB ToolBox averages 5.0 from 2 ratings.

### Do ACOG DII SMI or OB ToolBox have ads?

Neither ACOG DII SMI nor OB ToolBox shows ads.

### Which is updated more often, ACOG DII SMI or OB ToolBox?

ACOG DII SMI ships an update every 6 months, and OB ToolBox every 3 weeks. Most recently, ACOG DII SMI was updated on November 2, 2026 and OB ToolBox on November 3, 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.*