# Ersa TRACE vs Chatmaid Schedule

The clearest difference is update cadence: Chatmaid Schedule at every 6 weeks against Ersa TRACE's every 5 months. Ersa TRACE's advantage is review sentiment (75% vs 60%) and iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Ersa TRACE ships an update every 5 months, Chatmaid Schedule every 6 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Ersa TRACE | Chatmaid Schedule |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (9 ratings)](https://appshunter.io/ios/app/chatmaid-schedule/id6743800781/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | **75.0% of reviews** | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 38 MB | 49 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ersa GmbH](https://appshunter.io/developer/1484598243) | [Chatmaid Inc LLC](https://appshunter.io/developer/1784652006) |

## What reviewers say

### Ersa TRACE

[App page](https://appshunter.io/ios/app/ersa-trace/id1552856743)

This app enables smart operation of an IoT soldering station via smartphone or web application. It provides real-time temperature display, parameter control for single or multiple stations, and extensive traceability functions.

**Highlights:** Real-time temperature display, Target temperature setting, Soldering parameter control, Multi-station management, Web application integration, Traceability functions

**In-app purchases:** none


### Chatmaid Schedule

[App page](https://appshunter.io/ios/app/chatmaid-schedule/id6743800781)

Automate sending WhatsApp messages at scheduled times. Perfect for business reminders, birthday wishes, or follow-up texts. Ensures your messages are delivered precisely when intended.

**Highlights:** Easy message scheduling, Seamless WhatsApp integration, Edit scheduled messages, Historic review log, Business and individual use

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ersa TRACE free?

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

### Is Chatmaid Schedule free?

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

### Do Ersa TRACE or Chatmaid Schedule have ads?

Neither Ersa TRACE nor Chatmaid Schedule shows ads.

### Which is updated more often, Ersa TRACE or Chatmaid Schedule?

Ersa TRACE ships an update every 5 months, and Chatmaid Schedule every 6 weeks. Most recently, Ersa TRACE was updated on October 24, 2026 and Chatmaid Schedule 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.*