# UDAN EMS vs AptRing

The clearest difference is iOS requirement: AptRing at 13.0 against UDAN EMS's 15.0. 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.

UDAN EMS ships an update every 5 weeks, AptRing every 4 weeks. The most recent releases landed on November 14, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | UDAN EMS | AptRing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Size | 34 MB | 109 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) | [Hangzhou Sciener Smart Technology](https://appshunter.io/developer/1360996795) |

## What reviewers say

### UDAN EMS

[App page](https://appshunter.io/ios/app/udan-ems/id6467070220)

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

**In-app purchases:** none


### AptRing

[App page](https://appshunter.io/ios/app/aptring/id6756606365)

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

**In-app purchases:** none


## Frequently asked questions

### Is UDAN EMS free?

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

### Is AptRing free?

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

### Do UDAN EMS or AptRing have ads?

Neither UDAN EMS nor AptRing shows ads.

### Which is updated more often, UDAN EMS or AptRing?

UDAN EMS ships an update every 5 weeks, and AptRing every 4 weeks. Most recently, UDAN EMS was updated on November 14, 2026 and AptRing on November 9, 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.*