Independent mobile app developer — health, education & productivity apps for iOS and Android
DA Smart Solution is an independent mobile app development studio based in Viet Nam, run by Nguyen Van Duy. We build, publish, and market our own mobile applications for iOS and Android across health, education, and productivity categories.
We develop and advertise only our own apps. We do not provide services to external clients and we do not operate as an advertising agency.
We publish our apps on both the Apple App Store and Google Play. Our full catalog is available on both stores:
A free health tracking app that lets users calculate their BMI, log body weight and body measurements, track daily water intake, and view their progress over time with charts.
An AI note-taking app that turns photos, PDFs, YouTube links, and voice recordings into clean, structured notes with summaries, mind maps, and flashcards.
An AI-powered IELTS speaking practice app that scores spoken responses against Cambridge band criteria and gives writing feedback.
Our apps are free to download. We generate revenue through:
In-app advertising (Google AdMob)
In-app purchases and premium subscriptions
To grow our user base, we run Google Ads App campaigns that promote our own apps on Google Play, Google Search, YouTube, and the Google Display Network.
We use the Google Ads API to build an internal command-line tool that manages the Google Ads App campaigns promoting our own apps. The tool is used only by our own team. It is not sold, distributed, or made available to any external client or to the general public.
Campaign Creation — create App campaigns for our apps, including campaign budgets, target CPI bidding, and geographic and language targeting.
Campaign Management — update daily budgets and target CPI bids, pause and resume campaigns, and upload creative assets (headlines, descriptions, images, videos).
Reporting — retrieve performance metrics such as impressions, clicks, cost, installs, and in-app conversions, so we can monitor results and adjust our spend.
CampaignBudgetService, CampaignService, AdGroupService, AdGroupAdService, AssetService, CampaignCriterionService, and GoogleAdsService.
The tool reads and writes only our own Google Ads account data. It does not collect or process personal data of any end user, and no data is shared with third parties.
Nguyen Van Duy — DA Smart Solution
Email: nguyenvanduy.dev@gmail.com
Support: smartsolution.da@gmail.com
Location: Viet Nam