# microBIOMETER® Reader vs HERD SD

The clearest difference is update cadence: HERD SD at every 2 days against microBIOMETER® Reader's every 5 weeks. 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.

microBIOMETER® Reader ships an update every 5 weeks, HERD SD every 2 days. The most recent releases landed on August 2, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | microBIOMETER® Reader | HERD SD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/microbiometer-reader/id1211861156/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 106 MB | 33 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Prolific Earth Sciences Corporation](https://appshunter.io/developer/1211861155) | [Grazielle Cioletti](https://appshunter.io/developer/1825411960) |

## What reviewers say

### microBIOMETER® Reader

[App page](https://appshunter.io/ios/app/microbiometer-reader/id1211861156)

This application offers a rapid, on-site soil testing solution to assess microbial biomass and fungal-to-bacterial ratios. It helps users understand soil health, track the effectiveness of management practices, and support sustainable farming by monitoring changes in soil biology and carbon storage.

**Highlights:** On-site soil testing, Microbial biomass analysis, Fungal to bacterial ratio, Track management practice effectiveness, Monitor soil biology changes, Cloud portal data export, Custom project creation

**In-app purchases:** none


### HERD SD

[App page](https://appshunter.io/ios/app/herd-sd/id6748356498)

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

**In-app purchases:** none


## Frequently asked questions

### Is microBIOMETER® Reader free?

microBIOMETER® Reader is free to download, with no in-app purchases.

### Is HERD SD free?

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

### Do microBIOMETER® Reader or HERD SD have ads?

Neither microBIOMETER® Reader nor HERD SD shows ads.

### Which is updated more often, microBIOMETER® Reader or HERD SD?

microBIOMETER® Reader ships an update every 5 weeks, and HERD SD every 2 days. Most recently, microBIOMETER® Reader was updated on August 2, 2026 and HERD SD on September 10, 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.*