# EM3720 vs Gridphase

EM3720 and Gridphase are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

EM3720 ships an update every 4 months, Gridphase every 3 months. The most recent releases landed on September 18, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | EM3720 | Gridphase |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 6 MB | 57 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ZHANGZHOU EASTERN INTELLIGENT METER CO., LTD.](https://appshunter.io/developer/1064839954) | [GRID INSTRUMENTS d.o.o.](https://appshunter.io/developer/1711794018) |

## What reviewers say

### EM3720

[App page](https://appshunter.io/ios/app/em3720/id1376380656)

**Features:** macOS Compatibility

**In-app purchases:** none


### Gridphase

[App page](https://appshunter.io/ios/app/gridphase/id6469338974)

**In-app purchases:** none


## Frequently asked questions

### Is EM3720 free?

EM3720 is free to download, with no in-app purchases.

### Is Gridphase free?

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

### Do EM3720 or Gridphase have ads?

Neither EM3720 nor Gridphase shows ads.

### Which is updated more often, EM3720 or Gridphase?

EM3720 ships an update every 4 months, and Gridphase every 3 months. Most recently, EM3720 was updated on September 18, 2026 and Gridphase on May 17, 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.*