Vetcalculators vs DFsources
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vetcalculators
This app provides veterinarians and staff with a comprehensive suite of calculators for drug dosages, medical measurements, and patient assessments. It also includes a wide range of veterinary references for quick access to essential information.
- Drug dose calculators
- Emergency drug dosages
- Fluid therapy rates
- Toxicity calculators
- Pet age calculator
- Veterinary references
- Unit conversion
Read full descriptionHide full description
The Ultimate Veterinary Calculator App Vetcalculators is a Monthly Subscription. First Month is Free Vetcalculators is the number one Veterinary Calculator App for veterinarians, veterinary technicians, and staff. With Vetcalculators, one can quickly and easily calculate a variety of veterinary dosages and measurements. Vetcalculators includes calculators for: • Popup Drug Dose Calculator with ~200 veterinary drugs included • Emergency Drug dosage calculator • Anesthetic, Antibiotic and General drug dosage calculators • CRI (constant rate infusions) calculators • Fluid therapy rates • Blood glucose curve generator • Canine and Feline Calorie calculator • Pain score calculators • Chocolate toxicity • Rodenticide toxicity • Xylitol toxicity • Poisonous Plants • Blood transfusion volumes • Pet age and pregnancy calculator • Blood pressure • Trauma Triage scores • Modified Glasgow Coma score • Cushing diagnostic score • Unit conversion Vetcalculators also includes a variety of veterinary references, including: • Drug labels • IRIS stages • Pain scales • Normal lab values • Heartworm treatment protocols • Lab test protocols • Microchip lookup • Vertebral heart score • Body condition score charts • ACVIM Mitral Valve Disease 2019 Consensus Guidelines • ACVIM Feline Cardiomyopathy 2020 Consensus Guidelines • Dental charts • Feline and Canine AAHA Vaccination Guidelines • Flea and tick product information • Dog and cat breed search • RECOVER Guidelines • Document and QR code scanning Designed for Veterinarians by a Veterinarian, Vetcalculators is a valuable resource for all veterinarians, veterinary technicians, nurses, and staff. It can be used to calculate a variety of veterinary drug dosages, medical calculations, and measurements quickly and easily. The app also includes a variety of veterinary medical references. Download Vetcalculators today and start providing the best possible care for your patients! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
DFsources
Read full descriptionHide full description
Existing documents (PDF, PNG, JPG, DICOM, MP3, etc) can be added from local storage or by taking photos of paper documents. Once in DFsources, documents can have standard transformations (brighten/darken, rotate, skew) applied to them. User controls for redaction and certification are available. After study identifiers are applied, documents are sent directly to the DFdiscover study and attached as specified. Documents are immediately available for viewing in DFdiscover.
Screenshots
Verdict
The clearest difference is in-app purchases: DFsources at none against Vetcalculators's 1. Vetcalculators's advantage is update cadence (every 3 months vs every 7 months) and chart position (#59 vs unranked). On price, ads, device support and iOS requirement 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. Vetcalculators sells 1 in-app purchase, starting at $3.99 per month. DFsources asks for nothing beyond the download.
Vetcalculators ships an update every 3 months, DFsources every 7 months. The most recent releases landed on October 1, 2026 and September 14, 2026 respectively.
| Parameter | Vetcalculators | DFsources |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (606 ratings) — better | — |
| Positive reviews | 45.2% of reviews | — |
| Number of ratings | 606 — better | — |
| Update frequency | Every 3 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Best chart rank | #59 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.6 |
| Further details — not scored | ||
| Size | 85 MB | 55 MB |
| Age rating | 17+ | 4+ |
| Developer | LifeLearn USA | datafax |
Bugs and requests
Vetcalculators
Reported bugs
8 issues- App crashes or closes immediately upon opening
- UI elements unresponsive to clicks and taps
- Drug database fails to load after updates
- Data not persisting when app order is changed
- New drugs and concentrations not saving properly
Show 3 moreShow fewer
- Subscription charges reappearing after app reinstallation
- Recurring charges despite cancellation
- Inconsistent functionality across different sessions
Requested features
8 requests- Support for additional animal species beyond dogs and cats
- Gram weight unit option in addition to lbs and kgs
- Cross-device data synchronization
- Offline functionality without internet requirement
- Student pricing or free tier option
Show 3 moreShow fewer
- Ability to highlight/select individual drug line items
- Improved drug order saving functionality
- Free or freemium version with basic features
DFsources
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Vetcalculators
- Vetcalculators Subscription1 Month trial$3.991 Month
DFsources
No in-app purchases
Questions
Is Vetcalculators free?
Is DFsources free?
Do Vetcalculators or DFsources have ads?
Which is updated more often, Vetcalculators or DFsources?
Other comparisons
