Sisi Ncube, a product builder based in the West Midlands, arrives at her work on FibreTempo with credentials that span both lived experience and digital craft. A former bodybuilding competitor who has tracked nutrition meticulously for years and is currently training for a HYROX event, she brings deep familiarity with fitness culture alongside expertise in user-facing product design. Yet her journey toward building a health app was shaped less by enthusiasm for tracking itself than by recognising its pitfalls.
For much of her athletic life, Ncube relied on data to guide her decisions, drawing reassurance from hitting precise numerical targets. Over time, however, she noticed a troubling reversal: the metrics she had meant to serve her goals had become masters themselves. She found herself chasing scores rather than pursuing the underlying behaviours that mattered. The turning point came when she shifted her focus entirely, building routines that felt natural and sustainable rather than tethered to external benchmarks or race deadlines. This philosophical reorientation now sits at the heart of FibreTempo, her debut product launching on the App Store on 21 September.
Why Fibre Remains the Forgotten Nutrient
Despite only around 4% of UK adults consuming the recommended daily fibre intake, the nutrient has attracted far less cultural attention than protein, calories or step counts. Ncube attributes this partly to positioning. "Protein has become part of fitness culture. Calories have been part of diet culture for decades. Steps have a very simple daily number attached to them, and we've built whole ecosystems of watches, rings and apps around them. Fibre has traditionally been talked about in a much narrower way, often primarily in relation to digestion, when the wider conversation around it is much bigger," she explains.
Wellness culture itself favours metrics that are easiest to quantify and display, she suggests, which has sidelined fibre despite its broader health significance. The recent emergence of gut health as a mainstream concern and trends like fibremaxxing have shifted awareness. Yet Ncube sees the real challenge ahead as different from simply raising consciousness. "How do we take something people are suddenly talking about and turn it into a realistic behaviour they can maintain when the trend has moved on? That's the part that interests me most," she says.
The Fragility of Scores and Streaks
Most health applications rely on scores, streaks and targets as primary levers for behaviour change. Ncube understands their appeal intimately—she has used fitness apps for years and competed in bodybuilding—yet she has also experienced their darker side. "There's something incredibly satisfying about seeing a number move in the right direction. But I've also experienced what happens when that relationship becomes too rigid. There were times when I wasn't simply using the data to inform my behaviour anymore, I was chasing the data itself," she reflects.
The problem emerges when these mechanisms become fragile. A broken streak can deflate motivation. A low score can feel like failure. A target can overshadow the behaviour it was meant to encourage. Real life, Ncube observes, does not unfold in perfect streaks. People travel, face stressful periods, change routines, skip workouts and eat differently on weekends. "If a health product only feels rewarding when somebody is behaving perfectly, eventually a lot of people will disengage," she notes.
Her own shift came through separating the metric from the habit itself. Consistent gym attendance rooted in daily routine proves more resilient than attendance driven by maintaining a perfect score. This distinction—between tracking what you did and building what you naturally do next—became foundational to FibreTempo's design philosophy.
Tracking Versus Behaviour Change
During bodybuilding competition prep, Ncube could sustain extraordinary discipline because a clear endpoint existed. The harder question emerged afterwards: what sustains fitness when no competition, deadline or score demands attention? "That's when I started understanding that sustainable fitness comes from building behaviours that survive after the external goal disappears," she explains.
She still values data—her current HYROX training involves performance metrics—but now treats numbers as feedback supporting a habit rather than as the habit's purpose. The same principle applies to nutrition. "Telling somebody they ate 18g of fibre yesterday is tracking. Helping somebody gradually reach a point where they naturally think, 'I could add some beans, berries, seeds or wholegrains to this meal,' is behaviour change. The second is much harder to design for, but I think it's also much more valuable," she says.
Design as Behaviour-Change Mechanism
Building an engaging health product requires both rigorous underlying data and thoughtful design, though they serve different functions. Science and data ensure information is meaningful and trustworthy; design determines whether users understand it, find it accessible and actually return tomorrow. "You can have excellent data inside a product, but if the experience feels clinical, overwhelming or punitive, people may just stop using it," Ncube observes.
For her, design is not ornamental but integral to the behaviour-change mechanism itself. Word choice matters. Emphasis matters. The feedback users receive after positive choices matters. Even minute details shape emotional response. Given her history with fitness tracking, Ncube was deliberate about ensuring FibreTempo would not reduce a person's day to whether they hit a number. "I wanted the product to communicate progress without making perfection the price of feeling successful," she states.
The Shift From Reactive to Preventative
Consumer health technology is moving away from apps that respond after problems emerge toward those supporting daily decision-making. Ncube sees significant opportunity in the space between medical appointments, where thousands of small choices about eating, movement, sleep and stress management accumulate. Yet she hopes the next phase avoids simply amassing more data. "We already have an extraordinary amount of information about ourselves. The more interesting challenge now is: what do we actually do with it?" she asks.
The strongest health products, she believes, will become more contextual, more personalised and, counterintuitively, less demanding of attention. They will discern when to surface information, when to encourage and when to recede. "Preventative health technology should make healthy behaviour feel easier. It shouldn't make people feel as though they've acquired another full-time job managing themselves," she emphasises.
The Living Ecosystem: Beyond Dashboards
FibreTempo's defining design choice moves away from the conventional visual language of health apps—graphs, rings, percentages, streaks, progress bars, red and green indicators. Ncube questioned what progress might look like if it did not resemble measurement. The answer became the Living Ecosystem.
As users make consistent fibre-rich choices, the environment within FibreTempo grows and evolves alongside them. Movement and life animate the space. Even the landscape incorporates a subtle breathing quality. "I wanted somebody to feel as though they were nurturing something rather than simply filling another progress bar," Ncube explains. The underlying data remains accessible, but it no longer dominates the emotional experience. "I wanted progress to feel like something that grows with you," she adds.
From Concept to Launch
The path from initial fibre-focused research to a finished iPhone app proved intensely iterative. Early on, Ncube deliberately defined what FibreTempo should not be—another conventional nutrition dashboard—which shaped much of the subsequent work. The challenge became ensuring the Living Ecosystem genuinely connected to behaviour rather than functioning as decorative overlay atop data.
The process encompassed product logic, interaction design, visual design, development and continuous refinement. Countless small details that users might never consciously register contribute to how a product feels overall. Building publicly during the RevenueCat Shipaton added another dimension, allowing people to observe FibreTempo's evolution. Devpost highlighted one of her #buildinpublic posts about polishing the home-screen animation to achieve the landscape's subtle breathing effect—a moment Ncube appreciated because it acknowledged one of those tiny design choices.
The less glamorous aspects of shipping—testing, App Store requirements, unexpected behaviour, revisiting supposedly finished work and occasionally rebuilding sections—proved exhausting but essential. "That final layer of refinement can be exhausting, but I also think it's often the difference between having an idea and shipping something that genuinely feels like a finished product," she reflects.
Measuring Success Beyond Downloads
Following the 21 September launch, Ncube's definition of success extends well beyond download numbers. "The thing I'll be watching most closely is whether people come back," she says. Once the novelty of a new app fades, do users continue building their ecosystem? Do they begin thinking differently about fibre in their meals? Do certain behaviours become almost automatic through regular use?
Commercially, FibreTempo must become sustainable—Ncube is building a business, not a passion project. Yet she prefers building that sustainability on genuine usefulness and retention rather than optimising for the largest possible launch-week download spike. "In the first few months, success to me would be building a genuinely engaged group of users for whom FibreTempo has become part of everyday life – and then learning obsessively from what they do with it," she states.
What Comes Next
Ncube's immediate priority following launch is listening. Though she possesses numerous ideas for FibreTempo's evolution, she resists the temptation to immediately populate the product with features simply because she can build them. "Once people are using it in real life, I want to understand which parts genuinely help change behaviour, where people experience friction and what they naturally want more of," she explains.
Significant potential exists to deepen the Living Ecosystem and personalise the experience over time, but she wants that development driven by usefulness rather than feature count. For herself as a founder, FibreTempo has clarified the kinds of products she most enjoys building—those where technology, behaviour and thoughtful design converge to make everyday life easier or better.
She is increasingly drawn to a counterintuitive principle: good technology does not always need to demand more attention to be valuable. Sometimes the more interesting design challenge involves figuring out how technology can support people quietly enough that healthy behaviour persists even when the app no longer provides motivation. "That, for me, is probably the ultimate goal," she concludes.
Source: TechRound
