---
title: "DuoBrain: Speak at Work - Reviews, Revenue and Downloads in Vietnam | Apple App Store"
description: "Soft skills you can actually practice.  DuoBrain is a simulator for the conversations that matter at work: giving feedback, pushing back on a deadline, defending a decision, asking for a raise, holdin"
---

# DuoBrain: Speak at Work — Vietnam
> Practice hard conversations

![DuoBrain App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/cd/09/e7/cd09e7e5-177c-5735-77ed-185ba4cf64da/AppIcon-0-0-1x_U007ephone-0-1-0-85-220.png/434x0w.png)

**Developer:** [AIFA TECHNOLOGY FZ LLE](https://apptail.io/developer/aifa-technology-fz-lle-NVpcuc)
**Category:** Education
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** com.duobrain.ios
**Store:** Apple App Store
**Country:** Vietnam
**Version:** 1.5.0 (released 2026-09-28)
**Original Release:** 2026-06-02
**Languages:** English, French, Portuguese, Russian, Spanish

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/vn/app/app/id6756188731)
**AppTail Page:** [https://apptail.io/app/duobrain-speak-at-work-ulQA/vietnam](https://apptail.io/app/duobrain-speak-at-work-ulQA/vietnam)

## DuoBrain Description
Soft skills you can actually practice.

DuoBrain is a simulator for the conversations that matter at work: giving feedback, pushing back on a deadline, defending a decision, asking for a raise, holding your ground in a tense meeting.

Every quest is a real scenario. You pick how to respond, then explain your reasoning by voice or text. AI breaks down how clearly your idea landed: how you opened, whether your reasons held up, whether you named the outcome, and how it flowed.

WHAT YOU TRAIN
- Saying what you think without over-explaining
- Disagreeing without sounding aggressive or vague
- Structuring an argument on the spot
- Four communication styles: Drive, Influence, Support, Clarity

HOW IT WORKS
1. Read the scenario
2. Choose a response
3. Explain why you chose it
4. Get a score and a breakdown of what worked

PREMIUM
Word-by-word coaching: which sentences to keep, tighten or rewrite, plus a stronger version of your answer.

Built for professionals who work in English but think in another language, and for anyone whose ideas are sharper than they sound.

## DuoBrain Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6e/e1/4c/6ee14cf7-d494-43bd-c261-99ffced4388f/v2Screenshot01.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/bd/93/ce/bd93ce4e-6a54-b41c-be1c-a0bf3cbbcbae/v2Screenshot02.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/c7/62/e1/c762e12c-ab66-3250-7da7-7ed2772c72fd/v2Screenshot03.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/15/5b/17/155b1797-304d-17a2-650a-9cb2ce03ef65/v2Screenshot04.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/41/fb/15/41fb1553-57db-83f4-db6f-f3e840f918e0/v2Screenshot05.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a0/eb/5c/a0eb5c36-72aa-b531-7859-d7f6e6fae736/v2Screenshot06.png/1284x2778.png)

## DuoBrain Rating Breakdown in Vietnam
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)






## DuoBrain Available In
- [Vietnam](https://apptail.io/app/duobrain-speak-at-work-ulQA/vietnam)
- [Denmark](https://apptail.io/app/duobrain-speak-at-work-ulQA/denmark)
- [Algeria](https://apptail.io/app/duobrain-speak-at-work-ulQA/algeria)
- [Spain](https://apptail.io/app/duobrain-speak-at-work-ulQA/spain)
- [Israel](https://apptail.io/app/duobrain-speak-at-work-ulQA/israel)
- [Kazakhstan](https://apptail.io/app/duobrain-speak-at-work-ulQA/kazakhstan)
- [Lebanon](https://apptail.io/app/duobrain-speak-at-work-ulQA/lebanon)
- [Nigeria](https://apptail.io/app/duobrain-speak-at-work-ulQA/nigeria)
- [Cyprus](https://apptail.io/app/duobrain-speak-at-work-ulQA/cyprus)
- [Peru](https://apptail.io/app/duobrain-speak-at-work-ulQA/peru)
- [Russia](https://apptail.io/app/duobrain-speak-at-work-ulQA/russia)
- [Saudi Arabia](https://apptail.io/app/duobrain-speak-at-work-ulQA/saudi-arabia)
- [Thailand](https://apptail.io/app/duobrain-speak-at-work-ulQA/thailand)
- [Taiwan](https://apptail.io/app/duobrain-speak-at-work-ulQA/taiwan)
- [Ukraine](https://apptail.io/app/duobrain-speak-at-work-ulQA/ukraine)
- [United States](https://apptail.io/app/duobrain-speak-at-work-ulQA/united-states)
- [Norway](https://apptail.io/app/duobrain-speak-at-work-ulQA/norway)

---

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