ContrastRx vs OSTRICH
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ContrastRx
Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.
- Treatment regimens for contrast reactions
- Clinical descriptions and pictorial examples
- eGFR calculator
- Pediatric dose calculator
- Steroid pretreatment regimens
- Nephrogenic systemic fibrosis overview
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This app provides quick access to treatment regimens for potentially life-threatening reactions that can occur with iodine or gadolinium radiographic contrast. Included are clinical descriptions, pictorial examples, sound clips, and treatment regimens for the various types of reactions. Also included are a pediatric dose calculator, an eGFR calculator, a self-assessment module, pretreatment medication regimens, and an overview of nephrogenic systemic fibrosis.
OSTRICH
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OSTRICH – Offline System for Trials & Research Information Collection & Housing: It is a mobile app to support clinical trials at NINDS designed to allow researchers to collect patient's clinical data with encrypted storage and allow to upload to the remote systems such as Clinical Informatics System for Trials and Research (CiSTAR) or The Center for Neuroscience and Regenerative Medicine (CNRM) when connected via internet. It has the ability to collect data for patient scheduled visits and other detailed protocols that are imported from main systems dynamically.
Screenshots
Verdict
ContrastRx and OSTRICH are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
ContrastRx ships an update every 3 weeks, OSTRICH monthly. Both last shipped on November 3, 2026.
| Parameter | ContrastRx | OSTRICH |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (9 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 | 16.5 — better |
| Further details — not scored | ||
| Size | 9 MB | 13 MB |
| Age rating | 17+ | 17+ |
| Developer | Mayo Clinic | The National Institute of Neurological Disorders and Stroke |
In-app purchases
ContrastRx
No in-app purchases
OSTRICH
No in-app purchases
Questions
Is ContrastRx free?
Is OSTRICH free?
Do ContrastRx or OSTRICH have ads?
Which is updated more often, ContrastRx or OSTRICH?
Other comparisons
