cTrials vs PI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
cTrials
This app provides a mobile interface for searching clinical trials listed on clinicaltrials.gov. It offers user-friendly navigation with basic, advanced, and country-specific search options. Users can save trials to favorites, email listings, and contact investigators.
- Clinical trial search
- Basic and advanced search options
- Search by country/state
- Save trials to favorites
- Email trial listings
- Contact investigators
- Search history
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• A mobile front end for searching clinical trials listed on www.clinicaltrials.gov by National Library of Medicine (NLM/NIH) • All of the features of www.clinicaltrials.gov website are incorporated in this app. • Incorporates user friendly navigation schemes with Basic, Advanced, Refine Search and Search by Country /State features • Predictive Text feature for Basic Search screen • Customizable individual personal profile feature • Empowers the end users to save a clinical trial listing to favorites folder, e-mail the clinical trial, contact an investigator • Save the ‘Search History’ and many more… • Attach a personal profile with voice memo to an Clinical Study Investigator via e-mail • Contact a Clinical Study Investigator through the app
PI
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PI-Support is a mobile platform designed by senior Principal Investigators (PIs) to accomplish the following tasks: * save PIs and their site teams time and effort, * support Junior Investigators and trainees, * increase patient engagement and retention, * limit screen failures, * broaden study awareness, * integrate local HCPs and * improve data quality. It largely achieves these goals by empowering PIs and maximizing their involvement. Specifically, it enables PIs to select and prioritize which study criteria they want displayed on their colleagues’ cell phones or mobile devices (making pre-screening in busy office clinics and/or hospital ward rounds much easier for all concerned); it extracts from study protocols the answers to common patient queries (obviating the need for PIs and Sub-Is to locate and review extensive study protocols); it helps to ensure the right patients are enrolled into the right trial by offering side-by-side comparisons of each competing trial; and increases study awareness by enabling site teams to share selected study information with their community-based referral networks. Finally, intra- and inter-site bulletin boards allow PIs and SCs to discuss their local and study-wide concerns/solutions with other site PIs and SCs, CRAs and study sponsors. Overall, PI-Support can be used as a stand-alone tool or seamlessly integrated into existing CTMS to provide broad spectrum, site support.
Screenshots
Verdict
The clearest difference is update cadence: PI at fortnightly against cTrials's every 12 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
cTrials ships an update every 12 months, PI fortnightly. The most recent releases landed on June 11, 2026 and June 20, 2026 respectively.
| Parameter | cTrials | PI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 12 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.1 — better | 12.0 |
| Further details — not scored | ||
| Size | 12 MB | 21 MB |
| Age rating | 4+ | 17+ |
| Developer | visual soft, inc | Refuah Solutions Ltd |
In-app purchases
cTrials
No in-app purchases
PI
No in-app purchases








