FCall vs AustenTel ACS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FCall
This app provides a leading voice call service in Vietnam. It offers reliable communication for users across various Apple devices.
- Leading voice call service
- Reliable communication
- Supports iPhone, iPad, iPod
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- Dịch vụ Voice Call Hàng đầu Việt Nam
AustenTel ACS
This communication app allows users to make free calls to other users of the platform. It supports HD voice and video, push notifications, and functions as a SIP softphone.
- SIP softphone functionality
- Push notifications
- HD voice and video support
- Free calling between app users
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AustenTel ACS puts your organization's phone system in your pocket. Make and receive calls with your work extension, check voicemail with automatic transcription, message teammates, and stay reachable wherever work takes you. ACS is the AustenTel Advanced Communication System — a carrier-grade, cloud-hosted business phone platform. The ACS app connects to your organization's ACS service, so your business extension rings your iPhone like a native call. FEATURES • Your work extension on your iPhone — incoming calls arrive like any other call, even when the app is closed • HD voice with secure signaling and media (TLS + SRTP) • Visual voicemail with automatic transcription • Team messaging with photo attachments • Company directory with live presence • Call history synced across your devices • Hold, transfer, and conference controls • Organization-wide instant alerts (where enabled by your admin) GETTING STARTED The ACS app is for organizations using AustenTel ACS phone service. Your administrator provisions your extension and sends you a setup code or QR — enter or scan it and you're connected. There is no self-serve account setup. Don't have ACS yet? Learn more at austentel.com or call 800.817.7845. The ACS app requires an active AustenTel ACS extension.
Screenshots
Verdict
The clearest difference is device support: FCall at 3 against AustenTel ACS's 1. FCall also leads on iOS requirement (8.0 vs 17.0). On price, review sentiment, update cadence and ads 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. Neither carries in-app purchases, so what you see is what you pay.
FCall ships an update monthly, AustenTel ACS every 2 months. Both last shipped on October 24, 2026.
| Parameter | FCall | AustenTel ACS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 41 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | FPT Telecom | Austen Consultants, LLC |
Customer experience
FCall
AustenTel ACS
In-app purchases
FCall
No in-app purchases
AustenTel ACS
No in-app purchases
