SAS Flex vs NuPhone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Listen to call recordings
- Read call transcriptions
- Text callers directly
- Manage on-call schedules
- Review call activity
- Block unwanted callers
- Post operator alerts
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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.
NuPhone
This AI-powered receptionist handles your business calls 24/7, ensuring you never miss an opportunity. It provides call summaries, actionable reminders, and can even schedule appointments, all while maintaining your brand's professional image.
- AI call summaries and transcripts
- Actionable reminders from conversations
- On-brand AI receptionist
- Knowledge base for answering questions
- Appointment scheduling
- Dedicated business phone number
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NuPhone: The AI Receptionist Built for Your Business ********** Never Miss a Business Opportunity NuPhone answers missed calls with professionalism and accuracy—24/7. • AI call summaries and transcripts • Actionable reminders from every conversation • Call recordings always available ********** Elevate Your Brand Image • Always-available receptionist that speaks on-brand • Give clients access to business info, bookings, or support—all in one place • Impress customers with fast, intelligent, and consistent responses ********** Smarter with Every Call NuPhone continuously learns your business needs. • Gathers the most relevant info from you to serve your customers better • Adapts to caller patterns and preferences ********** Streamline Client Management • View call history and context per client • Track and manage follow-ups • Set smart reminders tied to specific conversations ********** Who is NuPhone for? NuPhone is designed for growing SMBs that rely on calls to drive business. Whether you’re running a real estate agency, law firm, medical clinic, service-based business, working as a contractor, or managing multiple client relationships, NuPhone acts as your intelligent, always-on receptionist without the overhead. ********** Key Features for SMBs • Dedicated business phone number • Intelligent reminders • Call recording & transcription • Knowledge base for answering specific questions • Business-specific keyword recognition • Customizable AI voice to match your brand • Smart call transferring • Appointment scheduling ********** Terms & Privacy https://www.nuphone.ai/privacy https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: NuPhone at 65% against SAS Flex's 25%. NuPhone also leads on update cadence (weekly vs fortnightly). SAS Flex's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price 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
Both are free to download. NuPhone sells 6 in-app purchases, starting at $29.99 per month. SAS Flex asks for nothing beyond the download.
SAS Flex ships an update fortnightly, NuPhone weekly. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.
| Parameter | SAS Flex | NuPhone |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.1 (88 ratings) — better |
| Positive reviews | 25.0% of reviews | 65.2% of reviews — better |
| Number of ratings | — | 88 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15 — better | 17.0 |
| Further details — not scored | ||
| Size | 55 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | Specialty Answering Service | WAKOAI INC. |
Customer experience
SAS Flex
NuPhone
Bugs and requests
SAS Flex
Not enough reviews yet to summarise bugs or requests.
NuPhone
Reported bugs
13 issues- Stuck on first page with connection error
- App won't save contacts correctly
- Force close app to see call details
- Call forwarding does not work
- Cannot get past sign up
Show 8 moreShow fewer
- AI agent can't hear customers
- AI has errors when customers call
- Awkward silence after caller speaks
- AI does not reply in Spanish
- Does not transfer calls as set up
- Cannot remove from voicemail
- Website pricing differs from app pricing
- Call log cannot be permanently removed
Requested features
2 requests- Way to remove call log permanently
- More productivity features
In-app purchases
SAS Flex
No in-app purchases
NuPhone
- Pro$29.991 Month
- Business$29.991 Month
- Monthly7 Days trial$29.991 Month
Show 3 moreShow fewer
- Business Yearly$249.991 Year
- Pro Yearly$249.991 Year
- Yearly7 Days trial$249.991 Year









