Months of Data-Cleaning Lag
Storing data in wide flat-files or Entity-Attribute-Value (EAV) layouts forces data analysts to spend weeks or months flattening and transforming sheets before epidemiological analysis can even begin.
Sustainable Data Infrastructure
Longitudinal health research,
Longitudinal health research,
engineered to outlast the grant cycle.
LongData is an offline-first, locally hosted platform built natively on a normalized relational architecture. We eliminate data-cleaning latency, remove DevOps maintenance overhead, and ensure absolute data sovereignty for demographic surveillance sites, national health registries, and clinical cohorts in resource-constrained environments.
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Continuous field deployment
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Reduction in data-cleaning lag
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On-premise data sovereignty
The Hidden Cost of "Free" Open Source
Moving Beyond the Hidden Costs of "Free" Open Source
Longitudinal public health research should be defined by scientific breakthroughs, not endless server troubleshooting. Traditional data tools — such as standard ODK and OpenHDS configurations — place an invisible, heavy burden on global health budgets.
Fragile DevOps Stacks
Multi-dependency frameworks requiring heavy containerization (Docker, Kubernetes, Java environments) frequently fail on local university servers during regional power fluctuations and network outages.
Data Sovereignty Violations
To bypass unstable local hosting, research tracks are routinely forced to migrate sensitive medical records to foreign, dollar-denominated public clouds — triggering continuous capital flight and strict regulatory compliance risks.
Engineered for Resilience, Sovereignty, and Sustainability
LongData replaces fragile setups with a hyper-compact infrastructure designed to outlast the typical 3-to-5-year grant cycle.
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Absolute On-Premise Data Sovereignty
LongData deploys 100% locally on secure, campus web servers. Patient and demographic data remains entirely within national borders, ensuring direct compliance with regional privacy frameworks like the Nigeria Data Protection Act (NDPA) without foreign cloud reliance.
No foreign cloud. No dollar-denominated SaaS contracts. No cross-border data
transfers. The master database, the PHP application server, and the field sync endpoint all live
on hardware your institution owns and physically controls.
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Zero-DevOps Architecture
Built entirely on a minimal-dependency HTML, PHP, and MySQL stack. The entire environment runs natively on standard, cost-effective infrastructure and can be fully maintained by local institutional IT personnel without specialized systems engineering.
No Docker. No Kubernetes. No Java runtime. No containers to rebuild after every
security patch, no microservices to orchestrate, no DevOps engineer on retainer. Your campus IT
team already has the skills to run it.
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Device-Agnostic, Offline-First PWA
Field teams launch the data collection tool via a simple web browser link on any smartphone. The Progressive Web App (PWA) operates flawlessly offline in remote enumeration areas, executing secure data synchronization once cellular networks re-stabilize.
Any device. Any browser. Zero install. Enumerators tap a URL, the app caches,
and fieldwork proceeds without bars of signal. Atomic sync transactions roll back cleanly if a
connection drops mid-upload.
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Natively Normalized Relational Schema
By enforcing relational table integrity right at the point of field entry, LongData cuts downstream dataset transformation and data-cleaning lag by up to 80%.
Not flat-files. Not EAV. Each form submission writes directly into structured,
indexed relational tables — household, individual, visit_log, diagnosis — with referential
integrity enforced by the database engine itself.
Field-Tested. Academically Validated.
An operationally vetted framework.
The architecture has undergone a rigorous, continuous 24-month longitudinal deployment in Nigeria under the direction of Prof. S. Adedini at Federal University Oye Ekiti. Over a two-year operational window across distributed, low-connectivity field settings, LongData successfully demonstrated zero data synchronization loss, proved completely stable on standard campus hardware, and fundamentally compressed the timeline between data capture and actionable public health analysis.
Read the technical brief
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Continuous deploymentAcross distributed low-connectivity field sites
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Synchronization loss eventsAcross all field sync cycles
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Data-cleaning lag reductionVs. legacy EAV / flat-file workflows
Partner with LongData
Select the track that aligns with your institutional objectives
Two formal partnership paths — one for site-level modernization cohorts, one for individual PIs embedding LongData into new grant proposals.
Sovereign Data Modernization Program
For existing HDSS networks & multi-centric cohorts
LongData is actively assembling a regional cohort of West African research hubs to undergo a fully funded infrastructure modernization. In partnership with global health foundations, multilateral development banks, and pan-African health informatics agencies, we design and submit joint structural grants to transition research nodes away from legacy tech debt.
Complete historical data migration from legacy ODK / flat-file formats.
On-site server calibration and ruggedized local architecture.
Full PWA access funded via global health security infrastructure grants.
Apply to join the Modernization Cohort
Co-Applicant & Grant Procurement Subcontracting
For individual PIs & active research proposers
Writing a fresh funding application — NIH Fogarty, Wellcome Trust, or Grand Challenges? Partner with LongData as your designated Informatics Technology Subcontractor. We will co-author your research environment methods text, provide our international compliance credentials (including our SAM.gov Unique Entity ID), and cleanly embed our lightweight, high-touch infrastructure into your approved grant budget lines.
Co-authored methods text and informatics workpackages.
SAM.gov Unique Entity ID and full compliance registry.
Pre-built budget justification language for major funders.
Partner on an upcoming proposal
Ready when you are
Move from legacy tech debt to sovereign infrastructure.
Whether you operate a national health registry, an HDSS node, or a single-PI cohort — there is a structured path into the LongData architecture.