# BioPhotonics vs Semi Dig

The clearest difference is update cadence: BioPhotonics at every 7 months against Semi Dig's every 17 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.

BioPhotonics ships an update every 7 months, Semi Dig every 17 months. The most recent releases landed on May 16, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | BioPhotonics | Semi Dig |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 17 months |
| Size | 25 MB | 62 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Laurin Publishing Co., Inc.](https://appshunter.io/developer/657383362) | [Gold Flag Media LLC](https://appshunter.io/developer/1573843456) |

## What reviewers say

### BioPhotonics

[App page](https://appshunter.io/ios/app/biophotonics/id657384558)

**Features:** macOS Compatibility

**In-app purchases:** none


### Semi Dig

[App page](https://appshunter.io/ios/app/semi-dig/id1573843454)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BioPhotonics free?

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

### Is Semi Dig free?

Semi Dig is free to download, with no in-app purchases.

### Do BioPhotonics or Semi Dig have ads?

Neither BioPhotonics nor Semi Dig shows ads.

### Which is updated more often, BioPhotonics or Semi Dig?

BioPhotonics ships an update every 7 months, and Semi Dig every 17 months. Most recently, BioPhotonics was updated on May 16, 2026 and Semi Dig on May 18, 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.*