Rx Days’ Supply Calculator vs SRx Affinity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rx Days’ Supply Calculator
This app helps community pharmacists and technicians accurately calculate medication days' supply and quantity. It offers specialized calculators for insulin, topical creams, Santyl, and eye drops, minimizing PBM recoupments and aiding recordkeeping.
- Days' supply and quantity calculators
- Insulin calculations (all dosage forms, biologics, priming units)
- Topical creams and ointments (fingertip unit method)
- Santyl dosing calculator (multiple wounds)
- Eye drops calculator (solutions, suspensions, PBM specific)
- PDF generation for recordkeeping
- Wireless printing and emailing of results
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With an annual subscription, community pharmacists and technicians can calculate the appropriate quantity or days’ supply with ease using the PAAS National Technologies Rx Days’ Supply Calculator app. Developed by the industry-leading audit assistance experts at PAAS National®, this robust Rx days’ supply and quantity calculator will help community pharmacies gain confidence, peace of mind, and minimize PBM recoupments. Featuring days’ supply and quantity calculators for: • Insulin --All dosage forms --Includes interchangeable and unbranded biologics --Ability to include priming units --Calculations consider beyond use dating • Topical Creams and Ointments --Utilizes the fingertip unit method --Touch screen selection • Santyl® Dosing Calculator --Ability to calculate multiple wounds --Avoids manufacturer rounding issues • Eye Drops --Solutions and Suspensions --Includes PBM specific calculations, when indicated When calculated, the application will produce a PDF that provides additional PAAS billing guidance and can be wirelessly printed or emailed for recordkeeping. Download the app today and subscribe to receive instant access to all of the calculators included in the app. Your subscription will renew automatically each year and payment will be charged to your iTunes account within 24-hours prior to the end of the current period. You can turn off auto-renewal by going to your Account Settings after purchase. By downloading the app you agree to the following Subscriber Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
SRx Affinity
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Foreshadowing made easy. SrxAffinity provides views of almost real-time business performance by aggregating metrics from prescription, drug, and billing data, and converting it into actionable data for single or multi-site locations. Use tools that allow you to filter and view your data with an at-a-glance comparison of business metrics. View pre-built or tailored custom reports that you currently use in SRx. Experience day by day control by viewing data so you are prepared for anything. Operations are broken down by workflow, billing, productivity, deliveries, staff, and summary categories. Monitor trends, discover anomalies, identify strengths and weaknesses to examine the health of your business. *This application only works with SuiteRx SRx software.
Screenshots
Verdict
The clearest difference is in-app purchases: SRx Affinity at none against Rx Days’ Supply Calculator's 1. Rx Days’ Supply Calculator's advantage is update cadence (every 4 months vs every 10 months). 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. Rx Days’ Supply Calculator sells 1 in-app purchase, starting at $5.99 per year. SRx Affinity asks for nothing beyond the download.
Rx Days’ Supply Calculator ships an update every 4 months, SRx Affinity every 10 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.
| Parameter | Rx Days’ Supply Calculator | SRx Affinity |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 4 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 51 MB | 23 MB |
| Age rating | 17+ | 4+ |
| Developer | PAAS National Technologies LLC | SUITE RX L L C |
In-app purchases
Rx Days’ Supply Calculator
- Annual Subscription7 Days trial$5.991 Year
SRx Affinity
No in-app purchases
Questions
Is Rx Days’ Supply Calculator free?
Is SRx Affinity free?
Do Rx Days’ Supply Calculator or SRx Affinity have ads?
Which is updated more often, Rx Days’ Supply Calculator or SRx Affinity?
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