Duo Call – Dual Global Calling is an Android communication app that lets travellers, digital nomads and expats stay in touch with friends and family around the world. The app is available on Google Play and has a 3.4‑star rating from about 19 thousand user reviews with 10 million+ downloads.
Duo Call is developed by JUS Technology Limited (a Hong Kong‑based developer) and the listing provides a support e‑mail ([email protected]) and privacy policy link.
According to the Play Store listing, the app was updated on 29 Jul 2025. Because apps on Google Play must comply with Google’s Developer Content Policy, Duo Call’s listing indicates it meets Google’s guidelines.
App overview
| Item | Details |
|---|---|
| Category | Communication |
| Rating | 3.4 stars |
| Reviews | ≈19 K reviews |
| Downloads | 10 M+ |
| Developer | JUS Technology Limited |
| Updated | 29 Jul 2025 |
| Support | [email protected] |
| Install | Download on Google Play |
Key features
Duo Call’s feature set aims to make global communication affordable and convenient:
100 % free global calls
The service advertises that you can call landlines and mobiles worldwide without contracts or hidden fees. Credits for calls can be earned inside the app by completing tasks (watching ads, spinning a daily wheel or playing games), and credits can also be purchased.
Free credits for new users
New users receive a 500‑credit bonus and there are multiple ways to earn more credits (daily lucky spins, playing online games or viewing ads). Credits provide minutes for calls; if you prefer not to earn them, you can buy credits.
Global coverage and clear call quality
Duo Call supports international calls to more than 200 countries. The app emphasises high‑quality audio with no hidden fees or roaming charges.
8‑way conference calls
The app’s “8‑Way Call” feature lets you connect up to eight participants with live video and advanced audio.
Call recordings and local storage
You can start or stop call recording at any time, and recordings are saved locally on your device rather than uploaded to the cloud. Local storage improves privacy.
Hide true caller ID
Duo Call lets users hide their real caller ID when making calls, which helps protect personal phone numbers.
No SIM card required
The app works over Wi‑Fi or cellular data and does not require a SIM card or phone number. This makes it useful for travellers without local SIMs.
Bonus feature: CallGPT
A newer version described on BlueStacks adds CallGPT, an AI‑enhanced assistant for tasks and content creation.
How Duo Call works
- Download from Google Play: Search for “Duo Call – Dual Global Calling” on Google Play. Since the Play Store only lists apps that follow Google’s developer policies, downloading from this source helps ensure the app meets Google’s guidelines.
- Earn or buy credits: After installing, you’ll receive free credits. Additional credits can be earned by watching ads, spinning the daily wheel or playing mini‑games. If you prefer, you can purchase credits directly.
- Make calls: Use the keypad to dial international numbers. The app shows the cost of the call in credits before connecting. Call recording can be toggled on or off at any time and is stored locally. You can hide your caller ID if desired.
- Conference calling: For group conversations, activate the 8‑way call feature to connect up to eight people simultaneously.
Pros and cons (based on user feedback)
| Aspect | Pros | Cons |
|---|---|---|
| Call quality | Clear audio for international calls. | Some users report occasional call drops or connectivity issues. |
| Credits & pricing | Free credits and affordable rates; ability to earn credits by performing tasks. | Rates vary by country and can be higher than local carriers, and some users dislike spending time to earn credits. |
| Features | Offers 8‑way calls, call recording, hide caller ID and AI‑assistant features. | Requires internet connectivity (Wi‑Fi or data) for the best performance; feature set may be limited compared with established communication platforms. |
| Ease of use | Simple interface and ability to call without a SIM card. | Some reviews mention account activation delays and issues purchasing credits. |
Privacy and data safety
Google Play’s data‑safety section indicates that Duo Call does not share data with third parties and that data is encrypted in transit. Users can request deletion of their data. Call recordings are stored locally on the device rather than uploaded to cloud servers, enhancing privacy.
Contact and support
The developer lists a support e‑mail ([email protected]) and provides a physical address in Hong Kong. For troubleshooting or subscription issues, users can use the in‑app “Feedback” option or contact the developer directly.
Verdict
Duo Call – Dual Global Calling is a convenient option for people who need to make international calls without a local SIM card. It offers free credits, conference calling and privacy‑focused features like call recording and caller ID hiding.
The app’s 3.4‑star rating and large install base indicate that many users find it useful, although there are complaints about call reliability and the time needed to earn credits. Because Duo Call is available through Google Play and complies with Google’s Developer Content Policy (link above), it’s a legitimate choice for global communication.
I put a lot of effort into writing and presenting each article with a proper understanding of the audience’s needs and tastes. And it is noteworthy that all my articles are written according to Google’s article policy.
