# Bio Island Authenticator vs DAVID Ovulation Tracker

The clearest difference is update cadence: DAVID Ovulation Tracker at monthly against Bio Island Authenticator's every 12 months. DAVID Ovulation Tracker also leads on review sentiment (19% vs 0%) and iOS requirement (11.0 vs 13.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 1.0 for Bio Island Authenticator against 1.0 for DAVID Ovulation Tracker. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 0% of Bio Island Authenticator's written reviews are positive against 19% of DAVID Ovulation Tracker's.

Bio Island Authenticator ships an update every 12 months, DAVID Ovulation Tracker monthly. The most recent releases landed on September 20, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Bio Island Authenticator | DAVID Ovulation Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/bio-island-authenticator/id1460744350/reviews) | [1.0 (1 ratings)](https://appshunter.io/ios/app/david-ovulation-tracker/id1572795820/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | **19.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Monthly** |
| Monetization | Free | Free |
| Size | 26 MB | 122 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [JBX Pty Ltd](https://appshunter.io/developer/1460744349) | [婕 李](https://appshunter.io/developer/1570072252) |

## What reviewers say

### Bio Island Authenticator

[App page](https://appshunter.io/ios/app/bio-island-authenticator/id1460744350)

Verify the authenticity of health products by scanning their labels with your iPhone camera. This app provides peace of mind when purchasing nutritional supplements and health foods.

**Highlights:** Scan product labels, Verify authenticity, Peace of mind, Nutritional supplement verification, Health food scanner

**Features:** macOS Compatibility

**In-app purchases:** none


### DAVID Ovulation Tracker

[App page](https://appshunter.io/ios/app/david-ovulation-tracker/id1572795820)

This app helps women track their ovulation cycles and identify their fertile window. It allows users to upload ovulation test results for quick analysis and prediction, aiding in conception efforts. The app also provides menstrual cycle calculations and pregnancy-related knowledge.

**Highlights:** Ovulation tracking, Fertile window prediction, Ovulation test result analysis, Menstrual cycle calculation, Pregnancy knowledge base, Test record keeping

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

**In-app purchases:** none


## Frequently asked questions

### Is Bio Island Authenticator free?

Bio Island Authenticator is free to download, with no in-app purchases.

### Is DAVID Ovulation Tracker free?

DAVID Ovulation Tracker is free to download, with no in-app purchases.

### Which has better reviews, Bio Island Authenticator or DAVID Ovulation Tracker?

Bio Island Authenticator and DAVID Ovulation Tracker are both rated 1.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Bio Island Authenticator or DAVID Ovulation Tracker have ads?

Neither Bio Island Authenticator nor DAVID Ovulation Tracker shows ads.

### Which is updated more often, Bio Island Authenticator or DAVID Ovulation Tracker?

Bio Island Authenticator ships an update every 12 months, and DAVID Ovulation Tracker monthly. Most recently, Bio Island Authenticator was updated on September 20, 2026 and DAVID Ovulation Tracker on September 25, 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.*