A financed phone is the only product I know where the customer’s screen is also our collections tool. That makes every screen a psychology problem before it is a UX problem.
tl;dr This prose follows one customer, Amina, through a year on a financed Galaxy A07: the dealer counter, the first week, a missed payment and a lock, a cracked screen, a theft, payoff and graduation to new upgrade/new product. At each moment it shows today’s screen, names the cognitive principles at work (about 30 across the story), draws the redesign, and names the metric it should move. It closes with the principles we refuse to use on a customer who owes us money.
As tradition dictates, a 2 year anniversary calls for another lessons learnt prose. You can find my year one reflections here
Every product is a behavioural system, whether its builders admit it or not. Content apps weaponise attention. Fintech apps weaponise commitment. Different battlefield, same brain. When Amina taps Pay, Accept or Continue, or holds her ID up to an agent’s camera, she is not running a calculation. She is moving through ambiguity, missing information, social pressure and a clock, using mental shortcuts that are older than money.
In credit, payments and wallets, the cost of a UX mistake is not churn. It is a mis-sent payment, a debt spiral, a compromised account, a regulatory breach, or a collapse of trust that takes years to rebuild. In the MDF business, add one more: a phone in the hands of a flasher. That is why UX psychology is not a cute extra. It is core product infrastructure.
Our journeys inherently push customers into conditions where shortcuts take over:
Under those conditions “good UX” does not mean delight. It means legibility, simplicity and brevity. That is behavioural design, and growth.design’s four-stage model is a clean way to structure it. People (1) filter information, (2) seek meaning in it, (3) act within a time constraint, and (4) store the experience in memory. Each stage has predictable failure modes, and in a credit product each failure mode maps to a risk outcome.
| Stage | What goes wrong for Amina | Risk outcome at Watu |
|---|---|---|
| Filter | She misses the amount, the date or the way out | Mis-sent payment; a lock she reads as fraud |
| Seek meaning | She reads the lock as a verdict, the SMS as a scam, the fee as a trick | Trust collapse; a referral to the flasher |
| Act in time | She pays twice, pays the wrong thing, or gives up | Debt spiral; paid-but-locked; a branch queue |
| Store | She remembers the lock, not the 300 good days | No second product; the story she tells at the market |
If the cost of a bad screen is a debt spiral, who on the team owns the screen?
Every moment has the same five parts, so you can skim by heading: