# ResponderApp vs CallMax UC

The clearest difference is update cadence: ResponderApp at monthly against CallMax UC's every 9 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.

ResponderApp ships an update monthly, CallMax UC every 9 months. Both last shipped on October 12, 2026.

## The numbers

| Metric | ResponderApp | CallMax UC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (50 ratings)](https://appshunter.io/ios/app/responderapp/id1569640151/reviews)** | — |
| Number of ratings | **50** | — |
| Positive reviews | 30.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free | — |
| Size | 44 MB | 68 MB |
| Requires iOS | 15.1 | **15** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Extra Duty Solutions](https://appshunter.io/developer/1569640153) | [TM Telcomm Corp](https://appshunter.io/developer/1822307258) |

## What reviewers say

### ResponderApp

[App page](https://appshunter.io/ios/app/responderapp/id1569640151)

This app provides a streamlined platform for agencies utilizing Xtra Duty or Extra Duty Solutions. It offers a convenient way to manage off-duty work and related administrative tasks.

**Highlights:** Off-duty work management, Agency integration, Streamlined administration, Xtra Duty support, Extra Duty Solutions partner

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

**In-app purchases:** none


### CallMax UC

[App page](https://appshunter.io/ios/app/callmax-uc/id6747675064)

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

**In-app purchases:** none


## Frequently asked questions

### Is ResponderApp free?

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

### Is CallMax UC free?

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

### Do ResponderApp or CallMax UC have ads?

Neither ResponderApp nor CallMax UC shows ads.

### Which is updated more often, ResponderApp or CallMax UC?

ResponderApp ships an update monthly, and CallMax UC every 9 months. Most recently, ResponderApp was updated on October 12, 2026 and CallMax UC on October 12, 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.*