CalfScan vs HERD SD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalfScan
This app provides a graphical interface for storing and evaluating calf lung ultrasound scan results. It is designed as a tool to support specific livestock management philosophies.
- Graphical interface for data entry
- Evaluation of calf lung ultrasound results
- Supports WeanClean Philosophy implementation
- Developed by veterinary medicine experts
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The CalfScan app uses a graphical interface to store and evaluate results from calf lung ultrasound, as described by Dr. Terri Ollivett. This app may be a useful tool when implementing the WeanClean Philosophy.
HERD SD
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Herd Evaluation of Risk Detection of Salmonella Dublin is a user-friendly tool designed for dairy farmers, veterinarians, and animal health professionals to assess and manage the risk of Salmonella Dublin within cattle herds. This app guides users through a structured evaluation of farm management practices, animal housing, biosecurity measures, and herd health indicators, generating a clear risk score and tailored information on the topic. Key Features: Interactive risk assessment across multiple farm areas Educational resources about Salmonella Dublin transmission, symptoms, and prevention Easy-to-read radar charts visualizing risk profiles Storage and review of previous assessments for ongoing herd health monitoring Practical recommendations to support biosecurity and herd management decisions Empower your herd health decisions with Herd Evaluation of Risk Detection of Salmonella Dublin and protect your animals, your business, and public health.
Screenshots
Verdict
The clearest difference is price: HERD SD at Free against CalfScan's $1.99. HERD SD also leads on update cadence (every 2 days vs every 18 months). CalfScan's advantage is iOS requirement (12.0 vs 14.0). On 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
HERD SD is free to download; CalfScan costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CalfScan ships an update every 18 months, HERD SD every 2 days. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.
| Parameter | CalfScan | HERD SD |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 18 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 6 MB | 33 MB |
| Age rating | 12+ | 4+ |
| Developer | University of Wisconsin - Madison School of Veterinary Medicine | Grazielle Cioletti |
In-app purchases
CalfScan
No in-app purchases
HERD SD
No in-app purchases
