# WIMS Rio vs AMCS Field Worker

The clearest difference is iOS requirement: WIMS Rio at 12.2 against AMCS Field Worker's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

WIMS Rio ships an update monthly, AMCS Field Worker fortnightly. The most recent releases landed on June 20, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | WIMS Rio | AMCS Field Worker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (14 ratings)](https://appshunter.io/ios/app/wims-rio/id1573801194/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | — |
| Size | 54 MB | 24 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aquatic Informatics ULC](https://appshunter.io/developer/1573801196) | [AMCSGROUP](https://appshunter.io/developer/1686082500) |

## What reviewers say

### WIMS Rio

[App page](https://appshunter.io/ios/app/wims-rio/id1573801194)

Streamline instrument readings from the field with this mobile app. Create and share Rio sheets, allowing anyone with access to update measurements. Readings sync automatically, and you can view historical data and recent updates.

**Highlights:** Update instrument readings from the field, Create and share Rio sheets, Automatic measurement syncing, View past measurements, See updated entries

**Features:** macOS Compatibility

**In-app purchases:** none


### AMCS Field Worker

[App page](https://appshunter.io/ios/app/amcs-field-worker/id6740287012)

**In-app purchases:** none


## Frequently asked questions

### Is WIMS Rio free?

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

### Is AMCS Field Worker free?

AMCS Field Worker is free to download, with no in-app purchases.

### Do WIMS Rio or AMCS Field Worker have ads?

Neither WIMS Rio nor AMCS Field Worker shows ads.

### Which is updated more often, WIMS Rio or AMCS Field Worker?

WIMS Rio ships an update monthly, and AMCS Field Worker fortnightly. Most recently, WIMS Rio was updated on June 20, 2026 and AMCS Field Worker on September 26, 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.*