The verdict in three sentences
For a distribution company whose 60 agents collect orders, readings and photos without stable coverage, an offline-first PWA costs EUR 15,000 to 38,000 (about USD 16,500 to 41,500, or 10 to 25 million FCFA) and ships in 3 to 4 months. The core of the budget is not the input screen but deferred sync with conflict handling, which guarantees no order is lost or duplicated. With Android devices around EUR 107 and about EUR 4.60 of data per agent per month, running costs stay far below those of a native app.
Why a PWA rather than a native app
A Progressive Web App installs from the browser, works without a connection thanks to the service worker and local storage (IndexedDB), and updates without going through the Play Store. For a fleet of entry-level Android phones, it is the best trade-off between cost, rollout speed and data usage.
| Criterion | Offline PWA | Native Android app | Paper forms |
|---|---|---|---|
| 2026 development cost | EUR 15,000 to 38,000 | EUR 27,000 to 61,000 | EUR 0 |
| Delivery time | 3 to 4 months | 5 to 7 months | Immediate |
| Updates | Automatic, no store | Via Play Store or MDM | Reprinting |
| Size on device | 2 to 5 MB | 20 to 60 MB | Not applicable |
| Works without network | Yes, several days | Yes | Yes |
| Office re-keying | None | None | 100% of forms |
| Data upload delay | As soon as signal returns | Same | 2 to 7 days |
The PWA can use the camera, geolocation and barcode scanning via the camera. Only a few advanced functions (Bluetooth thermal printers on some models) may justify a native add-on.
Detailed budget and running costs
Deferred sync is the most technical item: each entry is stored locally with a unique ID, sent as soon as the network returns, and conflicts (two agents editing the same customer, stock already depleted) are resolved by clear rules.
| Item | Content | 2026 cost |
|---|---|---|
| Scoping and mockups | Field workshops, agent journeys, screens | EUR 1,500 to 3,800 |
| PWA application | Forms, photos, GPS, local catalogue | EUR 5,300 to 12,200 |
| Sync and conflicts | Queue, retry, merge rules | EUR 3,800 to 9,900 |
| Back office and dashboards | Route tracking, exports, roles | EUR 3,000 to 8,400 |
| Field testing and training | 10-agent pilot, 2 training sessions | EUR 1,500 to 3,800 |
| Project total | EUR 15,000 to 38,000 | |
| Android devices | 60 x EUR 107 | EUR 6,400 |
| Mobile data | 60 x EUR 4.60 per month | EUR 275 per month |
| Hosting and maintenance | Server, backups, fixes | EUR 230 to 610 per month |
To save data, photos are compressed to about 150 KB before upload and the catalogue only updates by diff. An agent therefore uses 300 to 600 MB per month, which fits in an entry-level data plan.
Mini case study
Wei Ling, operations manager of a beverage and household goods distributor in Singapore with regional routes, supervises 60 agents visiting 1,800 outlets per week, several of them in areas with patchy coverage. Paper order slips are re-keyed by 4 data entry clerks and arrive 3 days late.
Budget: PWA at EUR 24,400, devices at EUR 6,400, data at EUR 3,300 per year. Gains: the 4 data entry roles (EUR 230 per month each in the West African benchmark, much more in Singapore) are reassigned to customer follow-up, worth EUR 11,000 per year in the benchmark, and delivery disputes (quantity errors) drop by about EUR 7,600 per year. Total: EUR 18,600 of annual gains for EUR 30,800 invested, payback in about 20 months, a 2026 order of magnitude that shortens sharply with Singapore wage levels.
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FAQ
How many days can a PWA work offline?
Several days, as long as phone storage allows: 500 orders with photos take about 80 MB. The agent always sees how many entries are waiting to upload.
What if the phone is lost before syncing?
Unsent entries are lost, hence automatic sync as soon as a 2G or 3G signal appears. Local data is encrypted and the account can be revoked in 1 minute from the back office.
Does the PWA run on EUR 107 phones?
Yes, Android 11 or later with 3 GB of RAM is enough. We test on the models actually purchased before rollout.
Can agents collect payment from the app?
Yes, integrating a mobile money or card payment adds EUR 2,300 to 4,600; collecting payment does however require a connection at that moment.
What is a realistic timeline?
Three to four months, including a 3-week pilot with 10 agents before rolling out to all 60.
Let's scope your project. We scope your field PWA (forms, sync, back office, devices) with an indicative budget and a pilot within 3 to 4 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.
