Comparison

cTrials vs PI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Clinical trial search
  • Basic and advanced search options
  • Search by country/state
  • Save trials to favorites
  • Email trial listings
  • Contact investigators
  • Search history
Read full description

• 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

About

PI

Features
Read full description

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

cTrials4 screens
PI4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

cTrials ships an update every 12 months, PI fortnightly. The most recent releases landed on June 11, 2026 and June 20, 2026 respectively.

Scorecard1 real difference · 9 level
cTrials versus PI: the parameters behind the verdict, then further details
ParametercTrialsPI
PriceFreeFree
Rating3.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 12 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS11.1 — better12.0
Further details — not scored
Size12 MB21 MB
Age rating4+17+
Developervisual soft, incRefuah Solutions Ltd

In-app purchases

None

cTrials

No in-app purchases

None

PI

No in-app purchases

Questions

Is cTrials free?
cTrials is free to download, with no in-app purchases.
Is PI free?
PI is free to download, with no in-app purchases.
Do cTrials or PI have ads?
Neither cTrials nor PI shows ads.
Which is updated more often, cTrials or PI?
cTrials ships an update every 12 months, and PI fortnightly. Most recently, cTrials was updated on June 11, 2026 and PI on June 20, 2026.

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