In this guide
The five options
1. Register and phone calls
A nurse or receptionist checks the register and calls patients who are due or overdue. It costs only staff time and airtime, and the personal touch works. It breaks when the list grows beyond what one person can call in a morning, or when that person is on leave.
2. Bulk SMS
Cheap per message and reaches every phone, including feature phones. But SMS from a shortcode feels like advertising, replies are awkward, and you rarely learn who actually read the message.
3. The WhatsApp Business app on a facility phone
Free, familiar and conversational. Fine for a small clinic. It is manual, tied to one handset, has no reporting, and sending the same message to many people can get the number restricted.
4. The follow-up module in your hospital system (HMIS)
If your HMIS already has appointment reminders, switch them on before buying anything else. Check what channel it uses (often SMS), whether it handles replies, and whether anyone reads the reports.
5. A dedicated follow-up system
Built only for bringing patients back: schedules, reminders, replies, tracing and reporting. Costs a monthly fee and needs your team to act on what it surfaces. Worth it when missed visits cost you more than the fee, which the revenue calculator will tell you in a minute.
Side-by-side comparison
| Option | Two-way replies | Scales past ~50 patients a day | Reporting | Main risk |
|---|---|---|---|---|
| Register and calls | Yes (by phone) | No | Manual | Depends on one person |
| Bulk SMS | Limited | Yes | Delivery only | Ignored as spam |
| WhatsApp Business app | Yes | No | None | Number restricted; data on one phone |
| HMIS module | Varies | Yes | Varies | Switched on but nobody acts on it |
| Dedicated follow-up system | Yes | Yes | Built in | Cost if not used consistently |
A warning about personal WhatsApp numbers
Some vendors send messages from a personal WhatsApp number or an unofficial tool. WhatsApp restricts and bans numbers that send bulk messages this way, and your patients' conversations end up on a device you do not control. For anything beyond a handful of messages, ask for the official WhatsApp Business Platform, and make sure the WhatsApp number is registered to your facility, not the vendor.
Ten questions to ask any vendor
- Are you registered with the Office of the Data Protection Commissioner, and will you sign a data processing agreement? (See our data protection checklist.)
- Where is patient data stored, and who at your company can see it?
- Which channel do you use: SMS, the official WhatsApp Business Platform, or something else?
- Whose name is the WhatsApp number or sender ID registered under?
- Can patients reply, and who reads and acts on the replies?
- Do you send messages in Kiswahili as well as English?
- What exactly does the monthly report show, and can I see a sample?
- Is messaging included in the price, or billed per message on top?
- How long does setup take, and what does my team have to do each day?
- If we stop, how do we get our data back, and what happens to the copies you hold?
When you do not need software
If you see fewer than about twenty follow-up patients a day and have one reliable person who will call the overdue list every morning, start with the register, a phone and our reminder templates. Measure your return rate for three months with the retention formulas. If it rises, you have your answer. If it does not, or the calls stop when that person is busy, a system will pay for itself.
Where HealthBridge fits
HealthBridge is a dedicated follow-up system, built by a registered nurse for Kenyan private facilities. The MCH system is live today for mothers and babies, and the OPD system is coming soon. It runs on the official WhatsApp Business Platform with the number registered to your facility, messages in English and Kiswahili, includes messaging in one flat fee, and we are registered with the ODPC as a data controller and processor. Ask us the ten questions above; we will answer every one in writing.
See the report owners receive every month
A real sample of the monthly retention report: returning patients, no-shows, ANC completion, immunisations and the patients slipping away. Fictional facility, real format. Free, no follow-up calls.