Comparison

Ooma Office vs SAS Flex

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ooma Office

This app allows small businesses to make and receive calls using their office phone number from anywhere. It offers features like a virtual receptionist, call transfers, and voicemail management, ensuring a professional image and never missing a client call. It can be used over Wi-Fi, even internationally, to avoid roaming charges.

Highlights
  • Virtual receptionist
  • Extension dialing
  • Call conferencing
  • Music-on-hold
  • Voicemail management
  • Call transfers
  • Wi-Fi calling
Features
Read full description

Make and receive calls from anywhere as if you’re in the office. Ooma Office mobile app is a calling app that works like a hard-wired business phone. Use features like a virtual receptionist, extension dialing, conferencing, and music-on-hold. You can also manage voicemails and transfer calls to other extensions. BE PROFESSIONAL Calls made using the app show your Ooma Office phone number so people will know that you’re calling for work. NEVER MISS A CALL The Ooma Office mobile app can be set up to ring whenever someone dials your Ooma Office number or extension. ACCESS YOUR ACCOUNT Check voicemail and update your account preferences from the app. KEEP CONNECTED ON THE GO Easily transfer calls to another extension, to your work voicemail, or to a coworker’s voicemail. TALK ON WI-FI Make and receive calls when you are connected to Wi-Fi. No cellular service required. This even works when you’re traveling abroad so you can avoid expensive roaming charges. HAVE A QUESTION? We are happy to hear your feedback or help you solve any Ooma Office issues. Email us at mobile-feedback@ooma.com for feedback on the app or call us at 888-711-6662 for customer support. ***** IMPORTANT NOTICES - PLEASE READ ***** Use of the Ooma Office application requires iOS version 11.0 or later and an Ooma Office account. If you do not have an Ooma Office account, you WILL NOT be able to use the application. This app is not compatible with the Ooma Telo or Ooma Hub. Be aware that some mobile network operators prohibit or restrict the use of VoIP (Voice over Internet Protocol) over their network. They may prohibit the use of VoIP over their network or impose additional fees and/or charges when using VoIP over their network. By using Ooma Office over 3G/4G/LTE, you agree to familiarize yourself with and abide by any restrictions your cellular carrier imposes and agree that Ooma will not be held liable for any charges, fees or liability imposed by your carrier for using Ooma Office over their 3G/4G/LTE network.

About

SAS Flex

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
Read full description

SAS Flex gives you full control of your answering service right from your phone. Stay connected to your callers, review call activity, and manage your on-call team from anywhere. With SAS Flex, you can listen to calls, read transcripts, send and receive text messages, adjust schedules, and keep your operators informed in real time — all from one easy-to-use app. Build stronger customer relationships, improve quality assurance, and make sure your business never misses a call. With the SAS Flex app, you’ll be able to: • Review every call in detail — listen to recordings, read transcriptions, rate call quality, and add notes for your team. • Text your callers directly and receive SMS replies right inside the app. • Tag and organize calls to keep your account clean and searchable. • Rate and review calls to help improve quality assurance and operator performance. • Block unwanted callers and manage IVR call activity. • Adjust your on-call staff schedule on the go, so the right person always gets the right call. • Add and edit FAQs to keep our operators updated with the latest business information. • Post operator alerts for urgent updates, special instructions, or quick internal messages. • View real-time reports, including minutes used, plan details, and balance information. • Place your account on “Hold My Calls” when you want to temporarily stop warm transfers. About Specialty Answering Service: Specialty Answering Service provides live and AI-assisted answering solutions for small and midsize businesses. Our professional receptionists answer calls, dispatch messages, and support your team 24/7 — helping you build trust with every customer interaction. Over 5,000 businesses rely on SAS to manage their communications and keep operations running smoothly. Try Specialty Answering Service free today and experience how effortless great customer communication can be.

Screenshots

Ooma Office4 screens
SAS Flex4 screens

Verdict

The call

The clearest difference is review sentiment: Ooma Office at 51% against SAS Flex's 25%. SAS Flex's advantage is update cadence (fortnightly vs every 6 weeks) and iOS requirement (15 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Ooma Office ships an update every 6 weeks, SAS Flex fortnightly. The most recent releases landed on October 16, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
Ooma Office versus SAS Flex: the parameters behind the verdict, then further details
ParameterOoma OfficeSAS Flex
PriceFreeFree
Rating4.9 (9.5K ratings) — better—
Positive reviews50.6% of reviews — better25.0% of reviews
Number of ratings9.5K — better—
Update frequencyEvery 6 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015 — better
Further details — not scored
Size220 MB55 MB
Age rating4+4+
DeveloperOoma Inc.Specialty Answering Service

Customer experience

Ooma Office

All ratings9,474 ratings
Positive97.7%
Neutral0.6%
Negative1.7%
Written reviews178 reviews
Positive50.6%
Neutral6.2%
Negative43.3%

SAS Flex

Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

Bugs and requests

Ooma Office

Reported bugs

3 issues
  • Login issues and account verification problems
  • Inconsistent call handling across devices
  • Voicemail and text message delivery failures

Requested features

4 requests
  • Ability to block callers
  • Improved SMS/MMS functionality
  • More customization options
  • Seamless integration between desktop and mobile

SAS Flex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ooma Office

No in-app purchases

None

SAS Flex

No in-app purchases

Questions

Is Ooma Office free?
Ooma Office 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 Ooma Office or SAS Flex have ads?
Neither Ooma Office nor SAS Flex shows ads.
Which is updated more often, Ooma Office or SAS Flex?
Ooma Office ships an update every 6 weeks, and SAS Flex fortnightly. Most recently, Ooma Office was updated on October 16, 2026 and SAS Flex on September 30, 2026.

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