# UKG iSeries vs ESI eMobile

The clearest difference is rating: ESI eMobile at 3.1 against UKG iSeries's 1.1. ESI eMobile also leads on review sentiment (33% vs 0%) and iOS requirement (11.0 vs 16.4). On price, ratings volume, update cadence and ads there is nothing between them.

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

ESI eMobile holds the better App Store score, 3.1 against 1.1. Both are backed by a comparable volume of ratings — 26 and 12 respectively. Written reviews point the same way: 0% of UKG iSeries's written reviews are positive against 33% of ESI eMobile's.

UKG iSeries ships an update every 4 months, ESI eMobile every 7 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | UKG iSeries | ESI eMobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.1 (26 ratings)](https://appshunter.io/ios/app/ukg-iseries/id1060582718/reviews) | **[3.1 (12 ratings)](https://appshunter.io/ios/app/esi-emobile/id1435172821/reviews)** |
| Number of ratings | **26** | 12 |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 37 MB | 70 MB |
| Requires iOS | 16.4 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kronos Incorporated](https://appshunter.io/developer/404059116) | [Estech Systems, Inc](https://appshunter.io/developer/624704430) |

## What reviewers say

### UKG iSeries

[App page](https://appshunter.io/ios/app/ukg-iseries/id1060582718)

Empower employees and managers to manage time and access business information on the go. This mobile solution allows users to stay productive from anywhere, facilitating efficient work for those on the road or away from their desks.

**Highlights:** Mobile time management, Access UKG iSeries Central, On-the-go productivity, Managerial access, Employee task focus

**In-app purchases:** none


### ESI eMobile

[App page](https://appshunter.io/ios/app/esi-emobile/id1435172821)

This business phone system app extends your office phone capabilities to your mobile device. Access voicemails, contacts, call recording, and manage extension preferences on the go. Communicate with colleagues and the outside world as if you were at your desk.

**Highlights:** Voicemail access, Coworker directory, Personal contacts, Call recording, Extension preference management, Conference calls, Coworker availability

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is UKG iSeries free?

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

### Is ESI eMobile free?

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

### Which has better reviews, UKG iSeries or ESI eMobile?

ESI eMobile is rated higher. UKG iSeries averages 1.1 out of 5 from 26 ratings, while ESI eMobile averages 3.1 from 12 ratings.

### Do UKG iSeries or ESI eMobile have ads?

Neither UKG iSeries nor ESI eMobile shows ads.

### Which is updated more often, UKG iSeries or ESI eMobile?

UKG iSeries ships an update every 4 months, and ESI eMobile every 7 months. Most recently, UKG iSeries was updated on October 24, 2026 and ESI eMobile on October 24, 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.*