# TMS Sidekick vs Otis eService

The clearest difference is rating: Otis eService at 3.4 against TMS Sidekick's 2.1. TMS Sidekick's advantage is update cadence (monthly vs every 4 months) and ratings volume (15 vs 5). On price, review sentiment, 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.

Otis eService holds the better App Store score, 3.4 against 2.1. Both are backed by a comparable volume of ratings — 15 and 5 respectively. Written reviews split almost evenly too, at 17% and 17% positive.

TMS Sidekick ships an update monthly, Otis eService every 4 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | TMS Sidekick | Otis eService |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (15 ratings)](https://appshunter.io/ios/app/tms-sidekick/id625467183/reviews) | **[3.4 (5 ratings)](https://appshunter.io/ios/app/otis-eservice/id632376485/reviews)** |
| Number of ratings | **15** | 5 |
| Positive reviews | 16.7% of reviews | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Size | 43 MB | 64 MB |
| Requires iOS | 10.3 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Four Rivers Software Systems Inc](https://appshunter.io/developer/625467186) | [Otis Elevator Company](https://appshunter.io/developer/992577451) |

## What reviewers say

### TMS Sidekick

[App page](https://appshunter.io/ios/app/tms-sidekick/id625467183)

This mobile solution provides technicians with on-the-go access to maintenance management systems. It allows for quick communication, task resolution, and data collection for work orders directly from a mobile device.

**Highlights:** On-the-go maintenance management, Access TMS database, Retrieve asset data, Perform scheduled maintenance, Collect data for work orders, Communicate on the go

**In-app purchases:** none


### Otis eService

[App page](https://appshunter.io/ios/app/otis-eservice/id632376485)

Access real-time equipment performance details, receive instant notifications, and view service history. Request service calls easily and manage your equipment's key operating metrics through a personalized dashboard.

**Highlights:** Real-time performance details, Instant notifications, Service history access, Service call requests, Equipment metrics dashboard, Contact options

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TMS Sidekick free?

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

### Is Otis eService free?

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

### Which has better reviews, TMS Sidekick or Otis eService?

Otis eService is rated higher. TMS Sidekick averages 2.1 out of 5 from 15 ratings, while Otis eService averages 3.4 from 5 ratings.

### Do TMS Sidekick or Otis eService have ads?

Neither TMS Sidekick nor Otis eService shows ads.

### Which is updated more often, TMS Sidekick or Otis eService?

TMS Sidekick ships an update monthly, and Otis eService every 4 months. Most recently, TMS Sidekick was updated on November 1, 2026 and Otis eService on November 1, 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.*