The verdict in three sentences
With 120 enumerators and 45,000 households, paper is expensive in data entry, errors and delays in donor reporting. KoboToolbox works for a one-off survey, but a custom offline app at 35,000 to 60,000 EUR pays off once the agency follows the same households over time and must produce dashboards for several donors. A realistic timeline is 3 months, enumerator training included.
KoboToolbox, hybrid or custom
The choice depends on three criteria: repeat visits to the same households, the complexity of data entry rules and the level of reporting donors expect.
| Criterion | KoboToolbox | Kobo + custom dashboard | Custom app |
|---|---|---|---|
| Initial cost 2026 | 0 EUR (humanitarian server) | 10,000 to 16,000 EUR | 35,000 to 60,000 EUR |
| Offline operation | Yes | Yes | Yes, with map cache |
| Longitudinal household tracking | Limited | Medium | Full (unique ID, history) |
| Geolocation and maps | Simple GPS point | Maps in the dashboard | Offline maps, zones assigned per agent |
| Donor dashboards | Exports to rework | Yes | Yes, by donor and indicator |
| Automatic quality control | Form rules | Partial | Duplicates, interview duration, GPS gaps |
| Annual maintenance | Low | 2,000 to 3,500 EUR | 5,000 to 9,000 EUR |
For a single 6-week survey, Kobo is unbeatable. For a multi-year programme with three rounds a year, a custom solution saves hundreds of hours of data cleaning.
What drives the cost of a field app
The agency is headquartered in Dublin but its teams work in areas with patchy coverage, power cuts and entry-level tablets. Deferred sync must resolve conflicts when two agents edit the same household.
| Item | Scope | Indicative budget (EUR) |
|---|---|---|
| Scoping and questionnaires | Workshop with M&E, 4 modules | 4,000 to 6,000 |
| Offline mobile app | Entry, photos, signature, deferred sync | 12,000 to 21,000 |
| Geolocation | Offline maps, zone assignment | 4,000 to 8,000 |
| Back office and quality control | Supervisor validation, alerts | 6,000 to 10,000 |
| Donor dashboards | Indicators, exports, secure access | 5,000 to 9,000 |
| Training and pilot | 2 sessions, 15 pilot agents, adjustments | 4,000 to 6,000 |
Hardware not included: a rugged tablet costs 170 to 280 EUR, a power bank about 25 EUR. Household data must be encrypted on device and hosted in line with GDPR, as an Irish data controller, plus host country rules.
Mini case study
Aminata, monitoring and evaluation lead at a humanitarian agency in Dublin, oversees 120 enumerators. Today each paper questionnaire costs about 0.70 EUR in printing and 0.90 EUR in data entry, so 1.60 EUR per household. With 45,000 households and one full round per year, paper costs 72,000 EUR annually.
She chooses a custom app at 48,000 EUR, plus 7,000 EUR annual maintenance and 120 tablets at 220 EUR (26,400 EUR, depreciated over 3 years, so 8,800 EUR a year). First-year saving: 72,000 minus 63,800 EUR, about 8,000 EUR, then roughly 56,000 EUR a year afterwards, not counting donor reports delivered in 5 days instead of 6 weeks.
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FAQ
Is KoboToolbox not enough for an NGO?
For one-off surveys it is, and it is free. It shows its limits as soon as you follow the same households over several years or must produce dashboards for 3 or 4 different donors.
How much does an offline census app cost?
Between 35,000 and 60,000 EUR depending on modules and mapping depth. Then budget 5,000 to 9,000 EUR a year for maintenance.
How does sync work without a network?
Data stays encrypted on the tablet and uploads automatically as soon as a connection appears, even on 2G. A day of 25 household interviews usually weighs under 5 MB excluding photos.
How long to roll out to 120 enumerators?
Three months: 3 weeks of scoping, 6 weeks of development, 2 weeks of pilot with 15 agents, then 1 week of general training.
Will donors fund this kind of tool?
Often, if it sits in the project's M&E budget line, commonly 5 to 10 % of the total. A tool reusable across projects is a valued argument.
Let's scope your project. Offline data collection app, geolocation and donor dashboards for 35,000 to 60,000 EUR, rolled out in 3 months. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
