MizuPhone vs STN UC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MizuPhone
This application allows users to make and receive VoIP calls and chat over various internet connections. It supports multiple VoIP providers and offers advanced PBX features for seamless communication.
- VoIP calls and chat
- Supports any connection (GPRS to 5G)
- SIP over UDP, TCP, and TLS
- Push notifications
- CallKit integration
- Multiple VoIP codecs with echo cancellation
- PBX features (hold, transfer, conference)
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Call your friends on VoIP. MizuPhone is a free customizable SIP softphone that lets you call your friends using any VoIP provider. Type your VoIP provider server address in “Server” input box, your SIP account Username and Password, and you're ready to go. Supported features: -Initiate and receive VoIP calls and chat over any connection above 15 kbits (GPRS, EDGE, WiFi, 3G, 4G, 5G) -SIP over UDP, TCP and TLS -Push notifications for always availability -CallKit native call integration -All the popular VoIP codec's are supported with echo cancellation including G.729 and OPUS wideband -PBX features such as DTMF, hold, transfer, conference, caller-id, call-wait, credit and rating display -A list of SIP related RFC’s and call-control features -Integration with server API such as new user registration, callback, SMS and others -Optional branding and customization
STN UC
This application functions as a SIP-based softphone, enabling users to make and receive calls and instant messages over Wi-Fi or cellular data. It integrates with a specific PBX system to support push notifications for incoming calls and messages, even when the app is not actively running.
- SIP-based softphone
- Wi-Fi or 4G/LTE calls
- Instant messaging
- Push notifications for calls
- Push notifications for messages
- Interworks with PortSIP PBX
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STN-UC is a SIP-based softphone for iPhone that uses Wi-Fi or 4G/LTE connection to make and receive calls and Instant Messages. Interworking with PortSIP PBX, STN-UC support push notification, which allows it receive calls and messages even it was force terminated.
Screenshots
Verdict
The clearest difference is review sentiment: MizuPhone at 33% against STN UC's 0%. MizuPhone also leads on iOS requirement (9.0 vs 11.0). On price, update cadence, ads and in-app purchases 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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | MizuPhone | STN UC |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 33.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 14 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Mizutech | PortSIP Solutions, Inc. |
Customer experience
MizuPhone
STN UC
In-app purchases
MizuPhone
No in-app purchases
STN UC
No in-app purchases
