Principle
Time Well Spent
A design philosophy arguing that the success of technology products should be measured not by time-on-device or engagement metrics, but by whether the experience left users better off — whether it contributed to human flourishing. Developed by Tristan Harris, a former Google design ethicist, Time Well Spent became the philosophical foundation of the humane technology movement. Its central argument is that current success metrics are not neutral measurements but active forces that optimise for compulsion over genuine value, and that redesigning those metrics would change the incentives producing harmful product design.
Tristan Harris developed the Time Well Spent concept while working as a design ethicist at Google. In 2013, he circulated an internal presentation, "A Call to Minimize Distraction and Respect Users' Attention," arguing that the technology industry was engaged in a "race to the bottom of the brain stem" — competing to exploit ever-more-primitive psychological mechanisms to capture attention, regardless of whether the resulting experiences served users. The document eventually circulated beyond the company and catalysed what became the humane technology movement.
Harris left Google and co-founded the Center for Humane Technology with Aza Raskin and others. The centre's argument is structural: the problem with technology's effects on wellbeing is not bad intentions from individual designers, but a misalignment between the metrics by which products are measured and the outcomes those metrics actually produce. Optimising for engagement time does not optimise for user benefit, and no amount of ethical individual behaviour will fix a systemic incentive problem.
The Time Well Spent alternative proposes a different set of success metrics. A product would be evaluated on: did users feel the experience was worth their time afterward? Did it help them do what they came to do? Did it support their goals, relationships, and flourishing — or did it exploit vulnerabilities and increase anxiety? These outcomes cannot be captured in real-time engagement data, which is precisely why they are not currently measured.
The policy dimension addresses the structural level: advertising-based business models create an inherent conflict of interest between platform revenue and user wellbeing that cannot be resolved through voluntary measures alone. Harris has testified before the US Senate and argued for regulatory intervention comparable to consumer protection frameworks applied to other industries.
The significance of Time Well Spent is not primarily the policy programme but the reframing. By proposing an alternative metric — flourishing rather than engagement — it makes visible what the current metric conceals: that "time spent" is not a measure of value delivered to users. Once this becomes visible, the question of what technology is actually for becomes unavoidable.
Key Figures
Tristan Harris
Former Google design ethicist, co-founder of Center for Humane Technology
Aza Raskin
Co-founder of Center for Humane Technology — inventor of infinite scroll, later campaigner against it
Further Reading