OB ToolBox vs Black River Supply
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OB ToolBox
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.
- 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
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OB ToolBox provides a useful and quick reference values for fetal growth, estimated fetal weight, amniotic fluid and doppler indices, Bishop scores, preterm birth predictor, cesarean risk calculator, stillbirth calculator, miscarriage risk calculator, and more.
Black River Supply
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Browse our full menu of products. Search by category, brand, and strain. Submit orders for pickup. Track your rewards and make rewards redemptions in-store or with online orders. Live chat allows you to get your questions answered quickly by our staff. Explore our full product selection: - Flower: pre-roll, infused pre-roll - Concentrates: Live resin, rosin, shatter, crumble, sauce, budder, distillate - Edibles: Baked goods, treats, candy, drinks, capsules - Topicals: Lubricants, creams - Merch: Apparel, accessories, bongs, filters, papers, lighters, grinders
Screenshots
Verdict
The clearest difference is update cadence: OB ToolBox at every 3 weeks against Black River Supply's every 6 months. OB ToolBox also leads on iOS requirement (13.0 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.
OB ToolBox ships an update every 3 weeks, Black River Supply every 6 months. The most recent releases landed on September 21, 2026 and October 7, 2026 respectively.
| Parameter | OB ToolBox | Black River Supply |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 56 MB | 9 MB |
| Age rating | 12+ | 17+ |
| Developer | Frederick Blair | Black River Supply Company LLC |
In-app purchases
OB ToolBox
No in-app purchases
Black River Supply
No in-app purchases
