# Biotech Calculators vs Eyedea Refractive

The clearest difference is update cadence: Eyedea Refractive at fortnightly against Biotech Calculators's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

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

Biotech Calculators ships an update every 5 months, Eyedea Refractive fortnightly. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Biotech Calculators | Eyedea Refractive |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/eyedea-refractive/id1501282600/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 124 MB | 57 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Biotech Vision Care](https://appshunter.io/developer/1056021059) | [Eyedea Educacao e Desenvolvimento em Oftalmologia LTDA](https://appshunter.io/developer/1524074580) |

## What reviewers say

### Biotech Calculators

[App page](https://appshunter.io/ios/app/biotech-calculators/id1056021060)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Eyedea Refractive

[App page](https://appshunter.io/ios/app/eyedea-refractive/id1501282600)

This medical app assists ophthalmologists in pre-operative evaluations for refractive surgeries like Lasik and PRK. It calculates various metrics after applying nomograms, aiding in surgical indication judgments alongside clinical evaluation.

**Highlights:** Refractive surgery calculator, Pre-operative evaluation tool, LASIK, Lenticular Extraction, PRK support, Nomogram application, Post-surgery refraction calculation, Residual stromal bed estimation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Biotech Calculators free?

Biotech Calculators is free to download, with no in-app purchases.

### Is Eyedea Refractive free?

Eyedea Refractive is free to download, with no in-app purchases.

### Do Biotech Calculators or Eyedea Refractive have ads?

Neither Biotech Calculators nor Eyedea Refractive shows ads.

### Which is updated more often, Biotech Calculators or Eyedea Refractive?

Biotech Calculators ships an update every 5 months, and Eyedea Refractive fortnightly. Most recently, Biotech Calculators was updated on October 26, 2026 and Eyedea Refractive on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*