# Baker HVAC Pro+ vs SAS Flex

The clearest difference is review sentiment: Baker HVAC Pro+ at 85% against SAS Flex's 25%. SAS Flex's advantage is monetization model (free vs ad-supported). 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.

Baker HVAC Pro+ ships an update monthly, SAS Flex fortnightly. The most recent releases landed on September 21, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Baker HVAC Pro+ | SAS Flex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (587 ratings)](https://appshunter.io/ios/app/baker-hvac-pro-plus/id511192312/reviews)** | — |
| Number of ratings | **587** | — |
| Positive reviews | **85.0% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 165 MB | 55 MB |
| Requires iOS | 16.0 | **15** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Watsco, Inc.](https://appshunter.io/developer/510378878) | [Specialty Answering Service](https://appshunter.io/developer/922095753) |

## What reviewers say

### Baker HVAC Pro+

[App page](https://appshunter.io/ios/app/baker-hvac-pro-plus/id511192312)

This app provides HVAC/R professionals with on-the-go access to product information and essential tools. It features real-time order tracking, a duct calculator, warranty verification, and branch location details. Users can also search for parts, view technical documents, and receive special offer notifications.

**Highlights:** Real-time order status, Duct calculator, Product availability and pricing, Warranty registration verification, Parts and model search, Technical document access, Branch locator and directions

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

**In-app purchases:** none

**What reviewers like**

- 👍 Time saver
- 👍 Easy to find information
- 👍 Great for ordering parts
- 👍 Helpful for checking stock
- 👍 Useful for customer warranties

**What reviewers complain about**

- 🐛 Error messages
- 🐛 App not working
- ⚠️ Too many alerts
- ⚠️ Annoying alerts

**Reported bugs**

- App not working anymore
- Error messages

**Requested features**

- Add R448A to P/T calc
- Tie account to app for pricing


### SAS Flex

[App page](https://appshunter.io/ios/app/sas-flex/id1532051532)

Manage your answering service from your phone. Listen to calls, read transcripts, text callers, and update schedules in real time. Improve customer relationships and ensure no calls are missed.

**Highlights:** Listen to call recordings, Read call transcriptions, Text callers directly, Manage on-call schedules, Review call activity, Block unwanted callers, Post operator alerts

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

**In-app purchases:** none


## Frequently asked questions

### Is Baker HVAC Pro+ free?

Baker HVAC Pro+ is free to download, with no in-app purchases.

### Is SAS Flex free?

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

### Do Baker HVAC Pro+ or SAS Flex have ads?

Neither Baker HVAC Pro+ nor SAS Flex shows ads.

### Which is updated more often, Baker HVAC Pro+ or SAS Flex?

Baker HVAC Pro+ ships an update monthly, and SAS Flex fortnightly. Most recently, Baker HVAC Pro+ was updated on September 21, 2026 and SAS Flex on September 10, 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.*