# Biotech Calculators vs Refractive Foundations

The clearest difference is update cadence: Refractive Foundations at daily 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, Refractive Foundations daily. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Biotech Calculators | Refractive Foundations |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Daily** |
| Size | 124 MB | 19 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [Biotech Vision Care](https://appshunter.io/developer/1056021059) | [Gurpal Virdi](https://appshunter.io/developer/1626671897) |

## 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


### Refractive Foundations

[App page](https://appshunter.io/ios/app/refractive-foundations/id6749237006)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Biotech Calculators free?

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

### Is Refractive Foundations free?

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

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

Neither Biotech Calculators nor Refractive Foundations shows ads.

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

Biotech Calculators ships an update every 5 months, and Refractive Foundations daily. Most recently, Biotech Calculators was updated on October 26, 2026 and Refractive Foundations on October 30, 2026.

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