Comparison

PI vs Peter the Protocol Reader

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

Head to head
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.

About

Peter the Protocol Reader

This AI assistant streamlines clinical research by quickly converting protocols into actionable insights. It's designed to enhance the quality and efficiency of research delivery for clinical sites.

Highlights
  • Protocol to practical insights
  • AI-powered assistance
  • High-quality research delivery
  • Secure and trusted
  • Confidence in research
Features
Read full description

Peter is the AI-assistant purpose-built for clinical research. Secure and trusted by study sponsors, Peter is designed to help you deliver high-quality research with confidence. Go from protocol to practical in seconds.

Screenshots

PI4 screens
Peter the Protocol Reader4 screens

Verdict

The call

PI and Peter the Protocol Reader 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

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

ScorecardNo meaningful differences
PI versus Peter the Protocol Reader: the parameters behind the verdict, then further details
ParameterPIPeter the Protocol Reader
PriceFreeFree
Rating—5.0 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size14 MB119 MB
Age rating17+17+
DeveloperRefuah Solutions LTDCare Access

In-app purchases

None

PI

No in-app purchases

None

Peter the Protocol Reader

No in-app purchases

Questions

Is PI free?
PI is free to download, with no in-app purchases.
Is Peter the Protocol Reader free?
Peter the Protocol Reader is free to download, with no in-app purchases.
Do PI or Peter the Protocol Reader have ads?
Neither PI nor Peter the Protocol Reader shows ads.
Which is updated more often, PI or Peter the Protocol Reader?
PI ships an update every 3 weeks, and Peter the Protocol Reader every 3 weeks. Most recently, PI was updated on November 3, 2026 and Peter the Protocol Reader on October 30, 2026.

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