# Biotech Calculators vs 9 Gaze

The clearest difference is update cadence: 9 Gaze at every 2 months against Biotech Calculators's every 5 months. 9 Gaze also leads on iOS requirement (13.0 vs 15.0). 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, 9 Gaze every 2 months. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Biotech Calculators | 9 Gaze |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (22 ratings)](https://appshunter.io/ios/app/9-gaze/id1173442389/reviews)** |
| Number of ratings | — | **22** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 124 MB | 36 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Biotech Vision Care](https://appshunter.io/developer/1056021059) | [See Vision, LLC](https://appshunter.io/developer/1173442388) |

## 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


### 9 Gaze

[App page](https://appshunter.io/ios/app/9-gaze/id1173442389)

This app helps document eye motility and strabismus in nine cardinal positions. It offers an on-screen guide for consistent eye positioning and automatically creates composite images for easy exporting. Users can add strabismus measurements and email or save images for medical records.

**Highlights:** Document eye motility and strabismus, On-screen guide for eye positioning, Automatic composite image creation, Add strabismus measurements, Selfie or standard mode, Email or save images

**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 9 Gaze free?

9 Gaze is free to download, with no in-app purchases.

### Do Biotech Calculators or 9 Gaze have ads?

Neither Biotech Calculators nor 9 Gaze shows ads.

### Which is updated more often, Biotech Calculators or 9 Gaze?

Biotech Calculators ships an update every 5 months, and 9 Gaze every 2 months. Most recently, Biotech Calculators was updated on October 26, 2026 and 9 Gaze on November 2, 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.*