MHTS is intended to inform real design and engineering decisions, from product requirements and technology components to user interactions, data flows and releases. The following guidance illustrates practical approaches without adding requirements beyond the published standards.
Designing for Vulnerable Users
Mental-health interfaces should be designed for the circumstances in which their intended users may need them. A person seeking assistance during acute distress may find complex instructions, excessive choices or unfamiliar terminology difficult to process. Emotional distress can also increase vulnerability to manipulation, particularly when interfaces exploit fear, guilt or the urgent desire for relief.
Developers should therefore examine the complete experience from the user's perspective. Important considerations include:
- How quickly can a user reach the intended support?
- Are the available actions immediately understandable?
- Can the experience be used without prior training?
- Does the interface introduce unnecessary choices?
- Are instructions concise and appropriately sequenced?
- Can the user access human or emergency assistance?
- Are there interruptions unrelated to receiving support?
- Could any messaging, design choices or commercial offers exploit the user's emotional vulnerability?
Where possible, developers should test relevant experiences with users representing the intended population, including appropriate accessibility and usability considerations.
A practical review might involve opening the application without any previous account, stored settings or knowledge of the service. If the user cannot reach the stabilisation function without navigating unnecessary steps, the interface requires further examination against Standard 3.
Visual appearance alone does not determine accessibility. A minimal interface may still be confusing, while a more detailed interface may remain usable if the information is carefully organised.
The goal is to reduce avoidable effort at the moment assistance is needed.
Privacy-First Architecture
MHTS Standard 1 and Standard 2 require privacy to be established through technical design. This begins with identifying what information the application genuinely requires. Developers should examine:
- Account and authentication systems.
- Forms and user-input fields.
- Cookies and other browser storage mechanisms.
- Analytics libraries.
- Advertising integrations.
- External scripts.
- Device identifiers.
- Application and server logs.
- Network requests.
- Third-party service providers.
- Free-text and conversational interfaces.
An application that does not visibly request personal information may nevertheless capture identifying information through its infrastructure. For example, persistent device identifiers, stored network metadata or conversation transcripts may create identifying records. Developers should therefore examine actual data collection and retention.
Third-party services require particular attention. A provider should not assume that an external component is compatible with MHTS simply because it serves a technical rather than advertising function. The relevant questions concern what data is transferred, whether any behavioural processing occurs and whether those flows are disclosed.
Applications using AI models should examine whether prompts, conversations or other inputs are transmitted to external providers and whether those inputs can contain identifiable or sensitive information.
Anonymous design also requires considering information that users may voluntarily enter. A free-text field can capture identifying information even when the application does not explicitly request a name.
The absence of a registration form is only one part of privacy-first architecture. The intended outcome is a system that provides support without capturing personal identity or conducting behavioural surveillance.
Ethical UX & Engagement
User-interface design influences more than convenience. The wording, timing and presentation of features can encourage particular behaviours. For mental-health technologies, those influences should be examined in relation to the user's wellbeing.
- Notifications
Notifications should not exploit emotional vulnerability or create fear, shame or artificial urgency. A reminder designed to make someone anxious about not using a service is inconsistent with Standard 5.
- Rewards
Reward mechanisms should not encourage the recurrence or repeated reporting of distress as an engagement objective.
- Streaks
MHTS explicitly prohibits streak-based retention systems. Developers should not treat daily participation as an inherently desirable outcome for emotional-support tools.
- Commercial Messages
Commercial messaging should be examined for psychological pressure. For example, presenting payment as a necessary condition for immediate relief can create serious ethical concerns.
- Language
Interfaces should avoid messages that exaggerate consequences, undermine user confidence or encourage inappropriate emotional reliance.
A useful design question is:
"Does this feature genuinely help users, or is it just designed to keep them coming back?"
If a feature is primarily designed to keep users coming back rather than genuinely help them, it should be reconsidered. The purpose is to support users in developing skills and stability, not to build a relationship in which continued emotional vulnerability becomes commercially valuable.
Safe Intervention Design
The sequence of an intervention is part of its design. MHTS Standard 4 establishes that, in relevant distress states, physiological down-regulation should precede reflection, analysis or education.
For developers, this means examining what the application asks the user to do first. A tool intended for acute emotional stabilisation might:
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Begin with regulation
Start with a suitable regulation exercise.
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Then invite reflection
Invite the user to consider or describe their emotional experience.
A different sequence may be appropriate for a product designed exclusively for general education, but its intended purpose must be clear.
Developers should avoid assuming that every user will benefit from the same intervention. The appropriateness of particular psychological techniques depends on the intended population, circumstances, available evidence and clinical considerations.
Digital support must also recognise situations where self-guided stabilisation is insufficient.
The sequence of the intervention should never prevent access to urgent professional help.
Human Support & Emergency Integration
MHTS Standard 6 requires clear access to genuine human emotional-support services and local emergency services. Implementation should consider both the visibility and practical usefulness of those pathways. Important questions include:
- Can users locate human-support options easily?
- Are emergency contacts appropriate to the user's location?
- Are support services accurately described?
- Are relevant numbers and links maintained?
- Can users seek emergency help without completing an exercise?
- Does the technology make its own limitations clear?
For international applications, one country's support arrangements should not automatically be assumed appropriate elsewhere.
For AI-based tools, particular care is required when describing the system's capabilities. A conversational model may provide supportive responses, but it must not imply that it possesses the authority or capabilities of a qualified healthcare professional when it does not. Likewise, an automated conversation should not discourage someone from seeking human assistance.
Where an immediate threat to life or safety exists, users should be directed to appropriate emergency services without unnecessary delay.
Applying Standards Throughout Development
MHTS should be considered throughout the product lifecycle.
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Product Definition
Identify the technology's intended purpose, users and circumstances of use. Determine which functions regulate, support or influence emotional states.
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Design
Review user journeys against the requirements for anonymous access, frictionless stabilisation, appropriate intervention sequencing and non-manipulative engagement.
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Architecture
Examine data collection, storage, external services, tracking mechanisms and network activity.
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Implementation
Ensure that the published requirements are reflected in the actual product, not only in design documentation.
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Testing
Test whether the relevant safeguards operate as intended. For example, verify that stabilisation remains accessible without registration and that prohibited tracking mechanisms are absent.
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Pre-Launch Review
Before launch, review the technology against all seven standards and address any areas of non-conformance.
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Ongoing Maintenance
Repeat relevant checks when introducing features, updating libraries, changing providers or modifying user interactions.
A product that previously met a requirement may cease to meet it following a technical or commercial change. Conformance therefore requires attention to the technology's current operation.