# Fields Area Measure on GIS Map vs Phi One

The clearest difference is in-app purchases: Phi One at none against Fields Area Measure on GIS Map's 3. Phi One also leads on ads (none vs shown) and update cadence (every 3 days vs fortnightly). Fields Area Measure on GIS Map's advantage is iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Fields Area Measure on GIS Map sells 3 in-app purchases, starting at $5.99 per 7 days. Phi One asks for nothing beyond the download.

Fields Area Measure on GIS Map ships an update fortnightly, Phi One every 3 days. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Fields Area Measure on GIS Map | Phi One |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Size | 127 MB | 32 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Streamwise](https://appshunter.io/developer/1856509078) | [Geist Energy](https://appshunter.io/developer/6802404852) |

## What reviewers say

### Fields Area Measure on GIS Map

[App page](https://appshunter.io/ios/app/fields-area-measure-on-gis-map/id6759908792)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week | $5.99 | per 7 days |
| moon | $14.99 | per month |
| year | $69.99 | per year |


### Phi One

[App page](https://appshunter.io/ios/app/phi-one/id6802404700)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fields Area Measure on GIS Map free?

Fields Area Measure on GIS Map is free to download, with in-app purchases available.

### Is Phi One free?

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

### Do Fields Area Measure on GIS Map or Phi One have ads?

Fields Area Measure on GIS Map shows ads; Phi One does not.

### Which is updated more often, Fields Area Measure on GIS Map or Phi One?

Fields Area Measure on GIS Map ships an update fortnightly, and Phi One every 3 days. Most recently, Fields Area Measure on GIS Map was updated on October 15, 2026 and Phi One on October 7, 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.*