Kois Reader vs PerioCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kois Reader
Access Kois Course materials, including manuals, checklists, and videos. Features live polling, automatic note backup and syncing across devices, and the ability to share notes with other participants. Requires course attendance for full access.
- Access course manuals and videos
- Live in-course polling
- Automatic note backup and sync
- Share notes with participants
- Browse page thumbnails
- Navigation history
Read full descriptionHide full description
The Kois Reader is the new and improved method for viewing Kois Course Materials. Access your course manuals, always pages, procedure checklist, videos, etc. ** Note: Course attendance required for materials access. New Features Include: + Live in-course polling from directly within the manual while at the Kois Center. + View document size before downloading. + Notes are automatically backed up and sync across devices. + Notes can be shared between participants within a course. + The notes list displays location of, date/time created, context of the note(s). + Browse through page thumbnails. + Forward and Back buttons, returns you to previous location(s) after jumping around content.
PerioCalc
This educational tool assists dental students and professionals in understanding and applying the latest periodontal classification guidelines for staging and grading periodontitis and peri-implantitis. It offers instant results for case-based learning, focusing on the 2018 Classification.
- Periodontal classification learning
- Staging and grading of periodontitis
- Peri-implantitis classification
- Case-based learning tool
- Instant results
- Based on 2018 Classification
Read full descriptionHide full description
Learn how to implement the new Periodontal Classification including staging and grading. The PerioCalc is an educational periodontal classification calculator that helps dental students and dentists understand what data to consider and how to use these for staging and grading of periodontitis and peri-implantitis consistent with the latest periodontal classification guidelines. The calculator is brief and efficient and provides an opportunity for case-based learning. Staging and grading is based on the 2018 Classification and results are returned instantly after data input. IMPORTANT NOTE: This calculator is an educational tool and should not be used for patient care, medical decisions or to substitute physician diagnosis.
Screenshots
Verdict
The clearest difference is review sentiment: PerioCalc at 100% against Kois Reader's 20%. PerioCalc also leads on rating (5.0 vs 3.6) and update cadence (every 3 months vs every 9 months). On price, ratings volume, ads and in-app purchases 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.
PerioCalc holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 10 and 6 respectively. Written reviews point the same way: 20% of Kois Reader's written reviews are positive against 100% of PerioCalc's.
Kois Reader ships an update every 9 months, PerioCalc every 3 months. The most recent releases landed on August 14, 2026 and June 7, 2026 respectively.
| Parameter | Kois Reader | PerioCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (10 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 20.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 — better | 6 |
| Update frequency | Every 9 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 75 MB | 22 MB |
| Age rating | 4+ | 12+ |
| Developer | Kois Center | Rutgers, The State University of New Jersey |
Customer experience
Kois Reader
PerioCalc
In-app purchases
Kois Reader
No in-app purchases
PerioCalc
No in-app purchases
Questions
Is Kois Reader free?
Is PerioCalc free?
Which has better reviews, Kois Reader or PerioCalc?
Do Kois Reader or PerioCalc have ads?
Which is updated more often, Kois Reader or PerioCalc?
Other comparisons
