# SAS Flex vs DocuFence

The clearest difference is update cadence: SAS Flex at fortnightly against DocuFence's every 6 weeks. SAS Flex also leads on iOS requirement (15 vs 17.0). 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.

SAS Flex ships an update fortnightly, DocuFence every 6 weeks. The most recent releases landed on September 30, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | SAS Flex | DocuFence |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free | — |
| Size | 55 MB | 53 MB |
| Requires iOS | **15** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Specialty Answering Service](https://appshunter.io/developer/922095753) | [DARWIN TECHNOLOGY L.L.C](https://appshunter.io/developer/1760284569) |

## What reviewers say

### 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


### DocuFence

[App page](https://appshunter.io/ios/app/docufence/id6746559575)

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

**In-app purchases:** none


## Frequently asked questions

### Is SAS Flex free?

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

### Is DocuFence free?

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

### Do SAS Flex or DocuFence have ads?

Neither SAS Flex nor DocuFence shows ads.

### Which is updated more often, SAS Flex or DocuFence?

SAS Flex ships an update fortnightly, and DocuFence every 6 weeks. Most recently, SAS Flex was updated on September 30, 2026 and DocuFence on September 28, 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.*