PI vs CAL Innov
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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 colleaguesβ 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.
CAL Innov
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With CAL-Innov, doctors can identify clinical trials suitable for their patients or according to their specialties and search for trials for many diseases as well as suggest patients.
Screenshots
Verdict
PI and CAL Innov are too close to call on the numbers: across 6 compared parameters β price, update cadence, ads and in-app purchases among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.
| Parameter | PI | CAL Innov |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15 β better |
| Further details β not scored | ||
| Size | 14 MB | 30 MB |
| Age rating | 17+ | 17+ |
| Developer | Refuah Solutions LTD | Centre Antoine LAcassagne |
In-app purchases
PI
No in-app purchases
CAL Innov
No in-app purchases









