Tangensys • Plan, deliver, measure
White-label app development for agencies
Support your agency’s app projects with a defined build, testing and handover process. Tangensys helps translate agreed user workflows into deliverable software while your team owns the client brief, approvals and release decision.
An agency handover you can review
Your brand, brief and approval route.
- Agreed scopeBrief
- Useful outputDeliver
- Agency approvalReview
How this agency service works
White-label app development is application delivery commissioned by an agency under its own client arrangement. The scope defines supported platforms, user roles, core journeys, data and integrations. Development, store submission, operating support and future updates need explicit responsibilities rather than being assumed from a screen count.
- Agency briefScope and client context
- DeliveryTangensys completes the agreed work
- Agency reviewYour team checks it first
- HandoverShared with your client under your brand
Delivery your account manager can explain
An app project becomes expensive when the team builds screens before resolving the workflow. Users may need offline access, staff permissions or a way to recover a failed submission. Identify the essential journey and sign-off cases first. A focused first version can then be reviewed as working behavior, with remaining features recorded as a future decision.
Where this support fits your agency
Agencies shaping a first client app
Reduce a broad idea to the essential user journey and supported platforms. A clear first release brief identifies what users must complete, what data is required and which features can wait.
Teams developing staff applications
Start with field or office tasks, user roles and unreliable-connectivity cases. The client’s operating team should review how work is recorded, assigned and recovered when something goes wrong.
Agencies inheriting an app project
Review source access, build dependencies, backend ownership and release accounts before committing to new features. A small repair or workflow test helps establish the condition of the inherited system.
What the agreed app development work can include
Use these areas to shape the brief. Your proposal identifies the actual outputs and who implements, approves and maintains them.
Product brief and release boundaries
Agree the intended users, essential actions and supported platforms. Identify backend requirements and the information the client owns. A prioritised first-release brief distinguishes necessary functionality from later ideas, helping the agency explain cost and scope without promising every feature at once.
Journeys, screens and permissions
Map how users enter, complete the main task and receive a result. Include the permissions governing what each role can see or change. Interface review considers empty, loading and failed states alongside successful screens so the client can evaluate the actual operating experience.
Application and backend delivery
Develop the agreed features and connect the required supported services. Existing systems, device needs and authentication affect the build approach. The proposal identifies which backend, integration and administrative functions are included and who supplies external access and approved business rules.
Device and failure testing
Test the agreed devices or platform versions and the critical workflow. Review invalid data, repeated requests, lost connectivity and restricted access where relevant. Your agency receives the sign-off evidence and unresolved issues, giving the client a realistic release decision rather than a demonstration of only the successful path.
Release and operating handover
Prepare the agreed build and documentation for the approved release route. Store accounts, provider approval, licensing and maintenance have named owners. Submission is not a guarantee of store approval. Future platform changes and ongoing operating support require a clear arrangement after the first version is delivered.
Practical detail
A delivery record your agency can review
A useful handover makes the finding, action and approval easy to follow. This example is illustrative; it does not describe a client project or claim a result.
| Work stage | Illustrative record | Agency review |
|---|---|---|
| Workflow | A field worker records a completed visit with intermittent connectivity. | Approve required fields, evidence permissions and the record owner. |
| Failure case | Connection drops before the server accepts the submission. | Check the agreed pending or retry behavior without duplicating records. |
| Role test | A staff user attempts to view another team’s restricted information. | Verify the defined permission boundary on the supported platform. |
| Release record | Keep device checks, unresolved issues and account ownership together. | The agency approves the release scope and future support responsibilities. |
Review the full user journey, supported-device behavior, permissions and recovery from failed actions.
Choose the engagement that fits the workload
A defined first project
Start with one essential user journey with its permissions and failure states. Agree the inputs, deliverable format and review decision before production. A small, clearly defined project gives your agency an opportunity to assess the quality of the output and the practicality of communication. It also reveals access or approval problems that should be resolved before more client accounts are added.
Recurring delivery support
Use an agreed account backlog for regular work, with capacity, priorities and reporting responsibilities made visible. Your agency decides which client requests move forward. The arrangement identifies what happens when urgent tasks compete with planned work, and how additional capacity is requested. A recurring scope should be reviewed when client requirements change.
Specialist project or overflow
Commission a specific task alongside your existing delivery team. Share previous decisions and identify where our responsibility starts and ends. The handover should fit your agency’s workflow so an outside contribution does not leave the account manager coordinating several conflicting versions. New requirements are reviewed as scope changes rather than assumed additions.
From the first brief to an accepted handover
The process gives your account manager a clear decision at each stage. Milestones and review rounds are agreed for the actual workload.
Set the account brief
Share supported platforms, users and roles, the core workflow, existing backend details and release-account ownership. We identify the starting task, missing information and delivery dependencies. Your agency confirms the client objective and scope. Discovery is useful when the current setup is uncertain; a rushed quotation should not hide unresolved access or implementation questions.
Prepare the agreed work
Production follows the approved brief and produces an agreed release brief, working feature set, sign-off evidence and operating handover. The working record distinguishes drafts, recommendations, implemented changes and tests. Questions that affect facts, permissions or scope go to your nominated contact, keeping the client decision with the person authorised to make it.
Review and resolve feedback
Your agency checks the output against the agreed sign-off checks and consolidates comments. We resolve in-scope feedback through that review route. A new requirement, blocked dependency or changed business instruction is recorded separately so everyone can see its effect on cost, schedule and the original delivery decision.
Approve the handover and next scope
Keep the accepted version, completed-task record and outstanding items together. Review the full user journey, supported-device behavior, permissions and recovery from failed actions. Your agency decides what is shared with the client and whether further work is appropriate. A successful initial task can support a capacity discussion; it does not automatically establish an unlimited delivery commitment.
Keep your agency in control of the client relationship
Your agency remains the client-facing decision owner. Day-to-day delivery runs through the nominated contact unless you explicitly approve another arrangement. If a client call is useful, agree the participants, roles and branding beforehand. The team should know who can make a commercial commitment and who is providing delivery information.
Before sharing client assets or access, agree confidentiality, permitted use, file ownership and any relevant contractual requirements. Use access suited to the task, with a record of who grants and removes it. The actual proposal identifies the delivery team and any partner involvement where relevant; specialist requirements should be discussed before sensitive client information is supplied.
A consistent review route protects everyone’s time. Consolidate client comments into one approved instruction, keep versions identifiable and record unresolved dependencies. These practices make it easier to retain your agency’s voice while giving the delivery team a brief it can act on.
What shapes your delivery quote
Pricing follows the work to be delivered, its complexity and the responsibilities included. For app development, share the proposed account or project, current setup and supported platforms, users and roles, the core workflow, existing backend details and release-account ownership. The quote should identify quantities or milestones, review rounds, client inputs and any work that remains with another provider.
Separate delivery charges from external costs such as media, hosting, licences, usage or specialist assets where relevant. Writing a recommendation, implementing it and maintaining it are different commitments. Your agency decides its client-facing price; our proposal makes the delivery scope clear so you can assess it against your own commercial arrangement.
Fixed response windows, ongoing capacity and urgent support are confirmed for the engagement. If the client changes the brief or a new dependency appears, we review its effect before proceeding. This keeps the account manager able to explain what is included and what needs a separate decision.
Handle revisions without losing the accepted version
For this service, consider a new platform behaviour. This is a hypothetical delivery situation, not a client result.
A service-specific decision
Review the device, backend and release dependencies. Shared screens do not establish identical platform behaviour. The agency should agree the supported test set and who approves submission.
A clear change record
Record the comment, source version and decision owner. A correction within the approved brief differs from a new deliverable. The agency should know the effect on scope and dependencies before promising the client a revised release.
A maintainable handover
Keep accepted assets or findings, test evidence and unresolved items together. Agree permitted client communication and future responsibility. A branded output is ready only when the underlying facts and task have passed the nominated review.
Free agency delivery review
Start with a clear scope and a practical next step.
Share your agency’s services, the client workload and the part of delivery you want support with. We’ll recommend a workable first engagement and provide a quote.
The initial review is free. Delivery, third-party charges and ongoing support are quoted separately.
Does the quotation include app-store publication?
The proposal states whether preparation or submission support is included and who owns the store accounts. Provider approval is an external decision. Account access, required policy information and release assets need to be ready. Ongoing support after publication is a separate responsibility unless included.
Can the first release leave some features for later?
Yes. Agree the minimum useful journey and identify what users must be able to complete safely. Later features remain in a prioritised backlog with their dependencies. Your agency can then compare a focused first release with a larger build without treating unfinished optional ideas as completed functionality.
Can the output use our agency branding?
We can agree branded or unbranded output formats for the work in scope. Share your template, required sections and preferred terminology before production. Your agency reviews the accepted version before it reaches the client. Branding changes should be part of the brief rather than improvised at the final handover.
Will you communicate directly with our client?
The default route is through your nominated agency contact. Direct involvement requires explicit agreement about the purpose, participants and responsibilities. Your agency retains control of the client relationship, approvals and commercial commitments. A useful technical call does not change that ownership.
How long does delivery take, and how are revisions handled?
The proposal records milestones, review rounds and the information needed to meet them. Your agency supplies consolidated feedback. Late access, missing factual approval or a changed requirement can affect the plan; the delivery record identifies that dependency and the decision needed. We confirm a realistic timeline after reviewing the actual brief.
Can we test the arrangement with one client?
Yes. A defined first task or account gives your team a concrete output to review and a practical way to test communication. Agree its scope and sign-off checks first. Ongoing capacity and a larger client workload are discussed after that experience, rather than assumed from the first quotation.
How is the work priced?
The proposal prices the defined delivery scope, complexity, review rounds and responsibilities. External charges are identified separately where relevant. Your agency sets its own client-facing fees. Share the account setup and required outputs so the quote can distinguish advice, production, implementation and any ongoing support.
What should we share to receive a quote?
Start with supported platforms, users and roles, the core workflow, existing backend details and release-account ownership. Explain the result your agency needs to hand to the client and which tasks stay with your own team. That information helps us propose an agreed release brief, working feature set, sign-off evidence and operating handover without leaving important approvals or implementation responsibilities unassigned.
Are business results guaranteed?
The agreed user journey and sign-off tests define delivery. Store approval, user adoption and commercial results involve decisions beyond the development work and are not guaranteed. The proposal identifies the work and appropriate evidence your agency will review.
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Let’s agree the right next step.
Tell us your goals and current setup. We’ll recommend a practical starting point and provide a custom quote.
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