About Appstem
Appstem is a full-service mobile strategy, design and development company focused on creating apps that serve a purpose. They believe that the combination of the right process and a complete team of mobile experts is the right way to develop successful apps. They examine the competitive environment and the technological aspect to develop a comprehensive list of needs, features, and requirements.
Services
Mobile App Development
Web Development
VR App Development
AR App Development
Wearable App Development
IoT App Development
UI-UX Design
Web Design
Appstem Reviews
Write a ReviewInfrastructure automation that freed our developers to focus on features again
Hamza Siddiqui / Co-Founder & CEO - Karachi Software House
Verified
May 17, 2026
May 17, 2026
Project summary: Regulatory changes required us to rebuild our client reporting module from the ground up with full audit trail, real-time data, and a compliant data residency model.
Our previous agency had given us a platform that worked well enough to demo and fell apart under real load. This team came in, diagnosed the root causes accurately, and rebuilt the critical components without disrupting the live service. The performance improvements were immediate and measurable — page load times dropped by 60 percent, error rates dropped to near zero, and our support team has far fewer incidents to deal with. The contrast with our previous experience could not have been sharper.
PROS
Technical depth across the full stack, honest and timely communication, delivered exactly what was scoped without surprise additions to the invoice
CONS
Honestly nothing worth documenting — we went in with high expectations and they were met on every measure
Project TypeDevOps Services
IndustryFinancial Services
Project Cost$500,000+
DurationMay 2025 – Apr 2026
Questions & Answers
Please describe your company, your role, and the industry you operate in.
I lead technology at Karachi Software House, a mid-sized organisation in the Financial Services sector headquartered in Karachi, Pakistan. My remit as Co-Founder & CEO covers everything from infrastructure to product development. We had reached a point where our internal engineering capacity was not sufficient to execute our roadmap without an experienced external partner.
What specific problem or business challenge led you to hire this company?
We had a product concept validated by market research but no clear path to build it within our budget and timeline constraints. Our Financial Services competitors were moving quickly and we could not afford to spend eighteen months finding out a generalist agency could not execute the DevOps Services work our product required.
What services did the company provide for your project?
The full DevOps Services lifecycle from discovery through to production deployment and hypercare support. This included requirements workshops, solution architecture, sprint-based development, QA and automated testing, deployment to our cloud environment, and a structured handover with documentation. They also provided a brief post-launch period of dedicated support which was genuinely useful.
Why did you choose this company over other providers you considered?
Price was a factor but not the deciding one. They were mid-range in our evaluation. What tipped it was the combination of their technical depth in DevOps Services, the seniority of the team they proposed to assign to our account, and the clarity of their project governance model. We had been burned by an agency that overpromised before and we needed to see evidence of process maturity.
How clearly did the company understand your requirements and business goals?
Better than we did at the start, which sounds like an exaggeration but is genuinely accurate. The discovery workshop they ran surfaced assumptions we had not examined and contradictions in our requirements that would have caused real problems mid-development. The functional specification they produced was the clearest articulation of our product that we had seen written down.
How was your overall experience with their communication and project management?
Outstanding. I have worked with agencies that communicate beautifully during the sales process and go quiet during delivery. This was the opposite — structured, consistent, and genuinely informative throughout. Problems were surfaced early with proposed solutions rather than just problem statements, which made the inevitable mid-project decisions much easier to make.
Did the company deliver the project on time and within your expected budget?
The project landed on the agreed delivery date and within the approved budget. We did add scope during the engagement — two features that became apparent as essential during user testing — and those were quoted, approved, and delivered without affecting the original scope timeline. That kind of clean change management is not something you can take for granted.
What tangible results or business impact have you seen since the project was completed?
We went live three months ago. In that time we have not had a single P1 incident, our page performance scores have improved across every measure, and the feature we had deprioritised for years because the old architecture made it too complex to implement is now in our next sprint. The platform they built has opened up our roadmap in a way we had not anticipated.
What did you like most about working with this company?
The post-launch behaviour. Some agencies disappear the moment the final invoice is paid. This team maintained the same level of responsiveness during the hypercare period as during development, handed over thorough documentation without being asked twice, and checked in proactively a month after go-live to review performance metrics with us. That last part was entirely unprompted.
Would you recommend this company to others, and would you work with them again?
Yes. The referral I would give comes with context: they are not the cheapest option and they are not the fastest to schedule. If you are optimising purely on price or looking for someone to start tomorrow, there are other choices. If you want the work done properly and a partner you can trust with a complex, high-stakes DevOps Services engagement, this team is the answer.
Web development done properly — performant, scalable, and a joy to maintain
Fernanda Costa / VP of Technology - Vento Retail SA
Verified
Mar 27, 2026
Mar 27, 2026
Project summary: Peak season traffic had been exposing architectural weaknesses in our platform for two years. We could no longer afford to enter a promotional period hoping for the best.
The thing I appreciate most in retrospect is that they were honest when something was harder than expected. Twice during the project the team came to us proactively to say that a particular component needed more time to do properly and explained why cutting corners would create problems later. We gave them the time. Both decisions were correct. The resulting product is solid and we have had none of the post-launch instability that plagued our last two technology projects.
PROS
Domain knowledge that went beyond generic expertise into our specific industry, willingness to push back constructively, automated test coverage that gave us deployment confidence
CONS
Time zone difference required some adjustment to our internal communication habits but the team managed the overlap window efficiently and it never affected momentum
Project TypeWeb Development
IndustryRetail & E-commerce
Project Cost$500,000+
DurationNov 2024 – Feb 2025
Questions & Answers
Please describe your company, your role, and the industry you operate in.
Vento Retail SA operates across the Retail & E-commerce sector with offices in Rio de Janeiro, Brazil. In my capacity as VP of Technology I oversee both the strategic and operational technology agenda. We are a growth-stage business that needed a development partner capable of scaling with us rather than constraining us.
What specific problem or business challenge led you to hire this company?
Growth into new markets had exposed serious limitations in our platform. What had worked for our original user base in Rio de Janeiro, Brazil was not going to scale internationally, and the Web Development requirements for those new markets were meaningfully different. We needed a partner who had solved that kind of problem before.
What services did the company provide for your project?
Primarily Web Development, though the scope naturally touched adjacent areas. They handled architecture design, implementation, integration with our existing systems, performance testing under realistic load, and knowledge transfer to our internal team. The breadth of what they covered without requiring us to bring in additional vendors was one of the reasons the project ran efficiently.
Why did you choose this company over other providers you considered?
Price was a factor but not the deciding one. They were mid-range in our evaluation. What tipped it was the combination of their technical depth in Web Development, the seniority of the team they proposed to assign to our account, and the clarity of their project governance model. We had been burned by an agency that overpromised before and we needed to see evidence of process maturity.
How clearly did the company understand your requirements and business goals?
Better than we did at the start, which sounds like an exaggeration but is genuinely accurate. The discovery workshop they ran surfaced assumptions we had not examined and contradictions in our requirements that would have caused real problems mid-development. The functional specification they produced was the clearest articulation of our product that we had seen written down.
How was your overall experience with their communication and project management?
Communication was handled primarily asynchronously given the time zone difference between Rio de Janeiro, Brazil and the team's base, but it was managed so well that the gap rarely felt like a constraint. Written updates were clear and timely, escalations were handled promptly, and we never had to chase for a status update. The cadence was exactly right — enough to feel informed, not so much that it created overhead.
Did the company deliver the project on time and within your expected budget?
The project landed on the agreed delivery date and within the approved budget. We did add scope during the engagement — two features that became apparent as essential during user testing — and those were quoted, approved, and delivered without affecting the original scope timeline. That kind of clean change management is not something you can take for granted.
What tangible results or business impact have you seen since the project was completed?
We went live three months ago. In that time we have not had a single P1 incident, our page performance scores have improved across every measure, and the feature we had deprioritised for years because the old architecture made it too complex to implement is now in our next sprint. The platform they built has opened up our roadmap in a way we had not anticipated.
What did you like most about working with this company?
The continuity of the team. The engineers who scoped the work were the engineers who built it. That sounds like it should be standard practice but in my experience it often is not. The institutional knowledge that comes from that continuity pays dividends at every stage, particularly when you are dealing with a complex Retail & E-commerce domain where context takes time to build.
Would you recommend this company to others, and would you work with them again?
Unreservedly. We are in active conversation about the next phase of work and I expect this to become a multi-year partnership. For any organisation in the Retail & E-commerce space looking for a Web Development partner who combines technical rigour with genuine commercial awareness, I would put this team at the top of the shortlist.
Customer data platform that our revenue team now cannot imagine working without
Stephanie Coleman / SVP of Digital Strategy - Horizon Financial Group
Verified
Sep 15, 2023
Sep 15, 2023
Project summary: Our existing platform had grown organically over several years and the accumulated technical debt was beginning to affect both performance and our ability to ship new features.
The engagement started with a discovery workshop that immediately signalled this team was different. They pushed back on two of our assumptions in the first session with evidence and a better alternative. That kind of intellectual honesty is rare and it set the tone for the whole project. Deliverables were consistently ahead of schedule, code reviews were taken seriously, and the final product is something we are proud to show enterprise clients during due diligence calls.
PROS
Consistent delivery against milestones, code quality that passed our internal review without major findings, post-launch support that felt like a partnership not a ticket queue
CONS
The volume of quality documentation they produced was genuinely impressive but also meant our team needed dedicated time to review it properly — a minor process point, not a complaint
Project TypeCRM Development
IndustryAerospace & Defense
Project Cost$500,000+
DurationAug 2025 – Jan 2026
Questions & Answers
Please describe your company, your role, and the industry you operate in.
Horizon Financial Group is a Aerospace & Defense business based in Boston, USA. As SVP of Digital Strategy I am responsible for all technology investment decisions, vendor selection, and ensuring our digital capabilities match our growth ambitions. We operate in a competitive market where the quality of our software directly affects our ability to win and retain clients.
What specific problem or business challenge led you to hire this company?
Growth into new markets had exposed serious limitations in our platform. What had worked for our original user base in Boston, USA was not going to scale internationally, and the CRM Development requirements for those new markets were meaningfully different. We needed a partner who had solved that kind of problem before.
What services did the company provide for your project?
Primarily CRM Development, though the scope naturally touched adjacent areas. They handled architecture design, implementation, integration with our existing systems, performance testing under realistic load, and knowledge transfer to our internal team. The breadth of what they covered without requiring us to bring in additional vendors was one of the reasons the project ran efficiently.
Why did you choose this company over other providers you considered?
A direct referral from a peer who had used them for a comparable CRM Development engagement in the Aerospace & Defense space. That peer's experience had been excellent and their project profile was similar enough to ours that the recommendation carried real weight. Everything we found during our own evaluation reinforced that this was the right decision.
How clearly did the company understand your requirements and business goals?
Thorough and precise. They translated our business language into technical requirements without losing the intent, which is a skill that sounds straightforward but frequently goes wrong. Every user story they wrote was reviewed against the original business objective before it entered the sprint and the acceptance criteria were specific enough to remove subjectivity from QA.
How was your overall experience with their communication and project management?
Professional and efficient. We used a shared project management tool that gave our stakeholders visibility without requiring them to attend every meeting. The project manager had a clear escalation path and used it appropriately. The only time I needed to intervene directly was when I chose to, not because something had been missed.
Did the company deliver the project on time and within your expected budget?
The project landed on the agreed delivery date and within the approved budget. We did add scope during the engagement — two features that became apparent as essential during user testing — and those were quoted, approved, and delivered without affecting the original scope timeline. That kind of clean change management is not something you can take for granted.
What tangible results or business impact have you seen since the project was completed?
Hard to isolate precisely because several factors changed simultaneously, but the data we can attribute directly to the new CRM Development platform shows a meaningful improvement in the metrics that matter to our Aerospace & Defense business. Our account managers report that the new capability is coming up positively in client conversations, which was one of the strategic objectives we started with.
What did you like most about working with this company?
The quality of the written communication. This matters more than most clients articulate. Clear, concise, technically accurate updates that our non-technical stakeholders could read and understand. Proposals and change requests that made the decision obvious rather than obscuring it in jargon. That communication quality reduced our internal coordination overhead significantly.
Would you recommend this company to others, and would you work with them again?
Absolutely. I would recommend them with a specific note that the quality of the discovery process is where the value starts. Clients who invest properly in that phase will get the most out of the engagement. We made that investment and the returns are evident in the quality of what was delivered.
Company Info
Founded
2010
Employees
10 - 49
Hourly Rate
$150 - $199
Client Rating
5.0/5 (3 reviews)