# eCall by Otis Elevator Co vs SURAE

The clearest difference is update cadence: SURAE at every 3 days against eCall by Otis Elevator Co's every 6 months. eCall by Otis Elevator Co's advantage is iOS requirement (12.0 vs 17.0). 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.

eCall by Otis Elevator Co ships an update every 6 months, SURAE every 3 days. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | eCall by Otis Elevator Co | SURAE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (12 ratings)](https://appshunter.io/ios/app/ecall-by-otis-elevator-co/id1084625173/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 34 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Otis Elevator Company](https://appshunter.io/developer/992577451) | [Donghun Kim](https://appshunter.io/developer/1669039058) |

## What reviewers say

### eCall by Otis Elevator Co

[App page](https://appshunter.io/ios/app/ecall-by-otis-elevator-co/id1084625173)

This app provides a smartphone interface to call elevators from anywhere within a building. It offers features for enhanced passenger convenience and allows users to search for and register with multiple buildings.

**Highlights:** Call elevator from anywhere, Smartphone interface, Enhanced passenger convenience options, Search and register for buildings, Cloud connection

**Features:** macOS Compatibility

**In-app purchases:** none


### SURAE

[App page](https://appshunter.io/ios/app/surae/id6783325645)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is eCall by Otis Elevator Co free?

eCall by Otis Elevator Co is free to download, with no in-app purchases.

### Is SURAE free?

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

### Do eCall by Otis Elevator Co or SURAE have ads?

Neither eCall by Otis Elevator Co nor SURAE shows ads.

### Which is updated more often, eCall by Otis Elevator Co or SURAE?

eCall by Otis Elevator Co ships an update every 6 months, and SURAE every 3 days. Most recently, eCall by Otis Elevator Co was updated on October 7, 2026 and SURAE on October 4, 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.*