EPTS Calculator vs Vidiyal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EPTS Calculator
Calculate the Estimated Post-Transplant Survival (EPTS) score for kidney transplant candidates. This tool helps medical professionals quickly assess a patient's longevity score based on age, diabetes, prior transplants, and dialysis time, determining eligibility for priority donor kidneys.
- Instant EPTS Calculation
- KDPI ≤20% Eligibility Badge
- What-If Scenario Comparison
- OPTN Formula Reference
- Clinician-Friendly Design
- Dark Mode Support
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EPTS Calculator — Kidney Transplant Survival Scoring Quickly calculate the Estimated Post-Transplant Survival (EPTS) score used in the U.S. kidney allocation system. Designed for transplant surgeons, nephrologists, coordinators, and researchers who need accurate, on-the-go EPTS percentile scoring. WHAT IT DOES The EPTS score estimates a kidney transplant candidate's expected post-transplant longevity using four OPTN-defined factors: patient age, diabetes status, prior solid organ transplants, and time on dialysis. Candidates scoring in the top 20% receive priority for the highest-longevity donor kidneys (KDPI ≤20%). KEY FEATURES • Instant EPTS Calculation — Adjust sliders and toggles, see your raw score and percentile update in real time with an animated gauge display • KDPI ≤20% Eligibility Badge — Immediately see whether a candidate qualifies for longevity-matched kidney priority • What-If Scenario Comparison — Model two sets of parameters side by side to counsel patients on how factors like starting dialysis or a diabetes diagnosis impact their score • OPTN Formula Reference — Built-in info sheet with the complete EPTS formula, coefficient explanations, allocation policy summary, and source citations • Clinician-Friendly Design — Clean, modern interface with haptic feedback, dark mode support, and frosted glass aesthetics designed for fast clinical workflows FORMULA & DATA The raw EPTS formula follows OPTN Policy 8.4.B with coefficients verified through 2025. The percentile mapping table is clearly labeled with its source year so you always know the data provenance. DISCLAIMER This tool is for educational and clinical reference purposes only. It is not a substitute for clinical judgment. The percentile mapping table is updated annually by OPTN — always verify against the current official tables before making allocation decisions. This app is not affiliated with OPTN, UNOS, or SRTR.
Vidiyal
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Tamil Nadu is one of the first States to initiate Cadaver Transplant in 1995 after the Transplantation of Human Organs Act was passed in the year 1994. Cadaver Transplant Program was started by the then Hon’ble Chief Minister Dr.Kalaignar.M.Karunanidhi in the year of 2008. Cadaver Transplant Programme was made a Government Society in May 2015 and named as Transplant Authority of Tamil Nadu under the Chairmanship of the Honourable Chief Minister of Tamil Nadu.
Screenshots
Verdict
The clearest difference is update cadence: Vidiyal at every 5 weeks against EPTS Calculator's every 12 months. Vidiyal also leads on device support (3 vs 1) and iOS requirement (11.0 vs 18.6). On price, 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.
EPTS Calculator ships an update every 12 months, Vidiyal every 5 weeks. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.
| Parameter | EPTS Calculator | Vidiyal |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 12 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 46 MB |
| Age rating | 4+ | 12+ |
| Developer | Marc L. Melcher | TRANSPLANT AUTHORITY OF TAMIL NADU |
In-app purchases
EPTS Calculator
No in-app purchases
Vidiyal
No in-app purchases








