# S vs IoT EMS

The clearest difference is iOS requirement: IoT EMS at 13 against S'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.

S ships an update monthly, IoT EMS every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | S | IoT EMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (15 ratings)](https://appshunter.io/ios/app/s-miles-installer/id1544207772/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 65.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | — |
| Size | 224 MB | 25 MB |
| Requires iOS | 15.0 | **13** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hoymiles Power Electronics Inc.](https://appshunter.io/developer/1219594358) | [ACREL CO.,LTD](https://appshunter.io/developer/1277572474) |

## What reviewers say

### S

[App page](https://appshunter.io/ios/app/s-miles-installer/id1544207772)

This app helps installers of distributed PV power plants manage accounts and provides visual guides for microinverter installation. It offers rapid configuration, power generation data, and detailed alarm information for commissioning and diagnostics.

**Highlights:** Account monitoring, Visual installation guide, Microinverter configuration, Power generation data, Module-level data, Alarm information, Commissioning & diagnostics

**Features:** macOS Compatibility

**In-app purchases:** none


### IoT EMS

[App page](https://appshunter.io/ios/app/iot-ems/id1560302424)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is S free?

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

### Is IoT EMS free?

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

### Do S or IoT EMS have ads?

Neither S nor IoT EMS shows ads.

### Which is updated more often, S or IoT EMS?

S ships an update monthly, and IoT EMS every 2 months. Most recently, S was updated on November 7, 2026 and IoT EMS on November 3, 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.*