AHRQuestionBuilder vs COSA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AHRQuestionBuilder
This app helps patients prepare for medical appointments by organizing visit details, symptoms, and questions. It allows customization of queries and saves time for both patients and healthcare providers. Users can also add appointments to their calendar and email details.
- Organize appointment details
- Customize questions for doctors
- Describe symptoms and concerns
- Add appointments to e-calendar
- Email appointment details
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The Question Builder helps patients prepare for medical visits so they get the most from their appointments. Users enter details such as date, healthcare provider, and reason for the visit. Next, they can choose or customize questions they want to ask at their appointment. Users are prompted to describe their symptoms and concerns in ways that will save time for both themselves and their medical providers. Users can add appointment information to their e-calendar and send details to their personal email account. For more information about Question Builder, please visit https://www.ahrq.gov/patients-consumers/patient-involvement/ask-your-doctor/index.html
COSA
Access essential drug information and advanced patient resources. This app provides a portion of licensed drug data from a leading healthcare information provider, based on industry-standard databases.
- Essential drug information
- Advanced patient resources
- Licensed drug data
- Industry-standard databases
- Physician-focused resources
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Find essential drug information & advanced patient resources. Physicians Office Resource licenses drug information data from First DataBank and provides a portion of it as a free service to its physician-users. First DataBank is the leading provider of electronic drug information to the healthcare industry. Based on the widely accepted industry standard — the National Drug Data File® — NDDF Plus databases are backed by the most clinically verifiable evidence gathered to date.
Screenshots
Verdict
The clearest difference is ads: AHRQuestionBuilder at none against COSA's shown. AHRQuestionBuilder also leads on rating (4.0 vs 3.7) and monetization model (free vs ad-supported). COSA's advantage is update cadence (every 3 months vs every 13 months) and iOS requirement (11.0 vs 14.0). On price, ratings volume, 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.
AHRQuestionBuilder holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 8 and 3 respectively.
AHRQuestionBuilder ships an update every 13 months, COSA every 3 months. The most recent releases landed on September 3, 2026 and September 10, 2026 respectively.
| Parameter | AHRQuestionBuilder | COSA |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (8 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 8 — better | 3 |
| Update frequency | Every 13 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | AHRQ | MEDICAL EDUCATION RESOURCES, LLC |
Customer experience
AHRQuestionBuilder
COSA
In-app purchases
AHRQuestionBuilder
No in-app purchases
COSA
No in-app purchases








