We are the only company in our region that has been focused on native mobile applications only. Our programming roots go back to 1999, but we are present on the territory of BIH since 2011 with the remote development team of 33 developers. Our Mostar office has been established in 2015 trying to boost projects for our supporting partners based in the UK, Netherlands, Switzerland, and New York. Applications that we maintain have 100k to 10M users. Our premium partners are companies such as Panasonic, Craftsman, and Victorinox. However, the majority of our clients are mid-tier companies or startups. Developers in QSD have a chance to work on the latest technologies such as Wear and iWatch apps. Our seniors have spent years in the field of mobile development and with their help, our juniors raise up to mid-levels at an incredible pace. It is said that 6 months spent in QSD are worth 2 years spent in another company.
We are the only company in our region that has been focused on native mobile applications only. Our programming roots go back to 1999, but we are present on the territory of BIH since 2011 with the remote development team of 33 developers. Our Mostar office has been established in 2015 trying to boost projects for our supporting partners based in the UK, Netherlands, Switzerland, and New York. Applications that we maintain have 100k to 10M users. Our premium partners are companies such as Panasonic, Craftsman, and Victorinox. However, the majority of our clients are mid-tier companies or startups. Developers in QSD have a chance to work on the latest technologies such as Wear and iWatch apps. Our seniors have spent years in the field of mobile development and with their help, our juniors raise up to mid-levels at an incredible pace. It is said that 6 months spent in QSD are worth 2 years spent in another company.
AI Overview
Performance snapshot
QSD is a mobile-focused development firm with a strong, consistent track record across 14 substantive reviews spanning iOS, Android, and custom software projects. The vendor earns predominantly Strong ratings across all five evaluation categories, driven by recurring client praise for technical depth, on-time delivery, and communication quality. No significant negative patterns or declining scores were identified in the dataset. The most notable anchor review references a 99% crash-free rate and multi-app delivery, providing measurable quality evidence.
Performance breakdown
Technical expertise
StrongReviewers consistently highlight QSD's breadth of technical capability across Java, Kotlin, Swift, PHP, Python, Ruby, and AWS integrations. Multiple clients noted high-quality deliverables, SDK development, and proactive quality monitoring resulting in a 99% crash-free rate.
Project management & delivery
StrongThe majority of reviews report on-time delivery and effective sprint-based workflows using Agile methodology. One reviewer noted a schedule sub-rating of 4.0, but this was isolated and did not indicate a systemic delivery concern across the broader dataset.
Communication & collaboration
StrongClients across multiple geographies — including the US, UK, Europe, and Asia — cite strong English fluency, transparency, and direct access to developers. Reviewers frequently describe QSD as easy to work with, responsive, and open to client feedback and suggestions.
Reliability
StrongMultiple long-term engagements spanning several years reflect a high degree of consistency and stability. One client referenced a 99% crash-free rate achieved through proactive monitoring, and several others note ongoing maintenance relationships extending well beyond initial delivery.
Client satisfaction & outcomes
StrongTangible outcomes include successful App Store and Google Play launches, an MVP brought to market for a loyalty startup, and an Android app reaching over 80,000 users during a campaign period. Willingness-to-refer scores are consistently 5.0 across nearly all reviewed engagements.
Best for
QSD is best suited for startups and SMEs requiring native iOS and Android development, app modernization, or long-term mobile development partnerships, particularly where cross-timezone communication and cost-effectiveness are priorities.
Clients info
QSD's client base spans education, information technology, sports broadcasting, petcare, arts and entertainment, and health sectors. Clients are predominantly small to mid-sized businesses, ranging from solo founders to companies with up to 200 employees. Project budgets most commonly fall in the $10,000–$199,999 range, with several engagements reaching $200,000–$999,999 for longer-term or multi-platform projects. Primary industries represented include Education, Information Technology, Sports Broadcasting, Arts, Entertainment & Music, Health & Medical, Petcare. Typical client size bands include 1-10 Employees, 11-50 Employees, 51-200 Employees. Common project budget ranges include $10,000 to $49,999, $50,000 to $199,999, $200,000 to $999,999.
Review strength
The assessment is based on 16 reviews sourced from two platforms, with 14 detailed reviews and 2 brief general ratings. The majority of substantive reviews were published between 2020 and 2023, with the most recent dated October 2023. Two reviews from 2018 and 2020 sourced from a general ratings platform are over three years old and carry limited analytical weight. Review date range: 2018-09-22 - 2023-10-24.
Performance breakdown
Technical expertise
StrongReviewers consistently highlight QSD's breadth of technical capability across Java, Kotlin, Swift, PHP, Python, Ruby, and AWS integrations. Multiple clients noted high-quality deliverables, SDK development, and proactive quality monitoring resulting in a 99% crash-free rate.
Project management & delivery
StrongThe majority of reviews report on-time delivery and effective sprint-based workflows using Agile methodology. One reviewer noted a schedule sub-rating of 4.0, but this was isolated and did not indicate a systemic delivery concern across the broader dataset.
Communication & collaboration
StrongClients across multiple geographies — including the US, UK, Europe, and Asia — cite strong English fluency, transparency, and direct access to developers. Reviewers frequently describe QSD as easy to work with, responsive, and open to client feedback and suggestions.
Reliability
StrongMultiple long-term engagements spanning several years reflect a high degree of consistency and stability. One client referenced a 99% crash-free rate achieved through proactive monitoring, and several others note ongoing maintenance relationships extending well beyond initial delivery.
Client satisfaction & outcomes
StrongTangible outcomes include successful App Store and Google Play launches, an MVP brought to market for a loyalty startup, and an Android app reaching over 80,000 users during a campaign period. Willingness-to-refer scores are consistently 5.0 across nearly all reviewed engagements.