# Xylem Optimyze vs Sermes SMS

The clearest difference is update cadence: Xylem Optimyze at every 2 months against Sermes SMS's every 5 months. 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.

Xylem Optimyze ships an update every 2 months, Sermes SMS every 5 months. The most recent releases landed on August 15, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Xylem Optimyze | Sermes SMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/xylem-optimyze/id1491361198/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 265 MB | 56 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xylem Inc.](https://appshunter.io/developer/582035368) | [SERMES](https://appshunter.io/developer/1611764255) |

## What reviewers say

### Xylem Optimyze

[App page](https://appshunter.io/ios/app/xylem-optimyze/id1491361198)

Monitor the condition of pumps, motors, and rotating equipment using wireless sensors. The app analyzes vibration and temperature data to provide insights into equipment health.

**Highlights:** Asset condition monitoring, Vibration data analysis, Temperature data analysis, Wireless sensor integration, Equipment health insights

**In-app purchases:** none


### Sermes SMS

[App page](https://appshunter.io/ios/app/sermes-sms/id1613554093)

**In-app purchases:** none


## Frequently asked questions

### Is Xylem Optimyze free?

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

### Is Sermes SMS free?

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

### Do Xylem Optimyze or Sermes SMS have ads?

Neither Xylem Optimyze nor Sermes SMS shows ads.

### Which is updated more often, Xylem Optimyze or Sermes SMS?

Xylem Optimyze ships an update every 2 months, and Sermes SMS every 5 months. Most recently, Xylem Optimyze was updated on August 15, 2026 and Sermes SMS on September 16, 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.*