# Comrex FieldTap vs Smart Drain Pro

The clearest difference is rating: Smart Drain Pro at 5.0 against Comrex FieldTap's 3.1. Smart Drain Pro also leads on iOS requirement (12.0 vs 15.6). Comrex FieldTap's advantage is ratings volume (11 vs 2). 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.

Smart Drain Pro holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Comrex FieldTap has 11 ratings behind it against 2, so its average is the more settled of the two.

Comrex FieldTap ships an update every 3 months, Smart Drain Pro every 5 months. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Comrex FieldTap | Smart Drain Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (11 ratings)](https://appshunter.io/ios/app/comrex-fieldtap/id1391824866/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/smart-drain-pro/id6739188395/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 52 MB | 23 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Comrex Corporation](https://appshunter.io/developer/537255780) | [David Sims](https://appshunter.io/developer/1709824648) |

## What reviewers say

### Comrex FieldTap

[App page](https://appshunter.io/ios/app/comrex-fieldtap/id1391824866)

This broadcast-oriented VoIP application offers audio level metering and a contact list for streamlined operation. It is designed for ease of use and high-quality audio.

**Highlights:** Broadcast-oriented VoIP, Audio level metering, Contact list, Streamlined operation, High-quality audio

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Drain Pro

[App page](https://appshunter.io/ios/app/smart-drain-pro/id6739188395)

Automate water heater valve operations with this Bluetooth-enabled scheduler. Set custom times and days for efficient residue removal and device management in residential and industrial settings.

**Highlights:** Bluetooth device control, Automated scheduling, Customizable day and time programming, Residue removal management, Remote device operation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Comrex FieldTap free?

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

### Is Smart Drain Pro free?

Smart Drain Pro is free to download, with no in-app purchases.

### Which has better reviews, Comrex FieldTap or Smart Drain Pro?

Smart Drain Pro is rated higher. Comrex FieldTap averages 3.1 out of 5 from 11 ratings, while Smart Drain Pro averages 5.0 from 2 ratings.

### Do Comrex FieldTap or Smart Drain Pro have ads?

Neither Comrex FieldTap nor Smart Drain Pro shows ads.

### Which is updated more often, Comrex FieldTap or Smart Drain Pro?

Comrex FieldTap ships an update every 3 months, and Smart Drain Pro every 5 months. Most recently, Comrex FieldTap was updated on October 24, 2026 and Smart Drain Pro on October 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.*