# Sentemeter Pro vs Em

The clearest difference is update cadence: Sentemeter Pro at every 2 months against Em's every 21 months. Em's advantage is iOS requirement (11.1 vs 15.1). 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.

Sentemeter Pro ships an update every 2 months, Em every 21 months. The most recent releases landed on September 17, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Sentemeter Pro | Em |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 21 months |
| Size | 38 MB | 32 MB |
| Requires iOS | 15.1 | **11.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [LUNAR ROCK TECHNOLOGIES FZCO](https://appshunter.io/developer/1451167046) | [Aabasoft Technologies (India) Private Limited](https://appshunter.io/developer/1259808238) |

## What reviewers say

### Sentemeter Pro

[App page](https://appshunter.io/ios/app/sentemeter-pro/id1451167047)

**Features:** macOS Compatibility

**In-app purchases:** none


### Em

[App page](https://appshunter.io/ios/app/em-pay/id1496324333)

**In-app purchases:** none


## Frequently asked questions

### Is Sentemeter Pro free?

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

### Is Em free?

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

### Do Sentemeter Pro or Em have ads?

Neither Sentemeter Pro nor Em shows ads.

### Which is updated more often, Sentemeter Pro or Em?

Sentemeter Pro ships an update every 2 months, and Em every 21 months. Most recently, Sentemeter Pro was updated on September 17, 2026 and Em 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.*