Stack signals
Stripe + Supabase + PostHog
- ✓ Payments
- ✓ Auth sessions
- ✓ Analytics cookies
private preview planning
Privacy docs, disclosures, sources. Aligned.
Synthrek turns the services inside your indie app into cautious privacy-policy clauses, app-store disclosure notes, processor-list entries, and source IDs you can review before launch.
Apple Privacy DetailsGoogle Data SafetyGDPR processorsCookie checksVendor DPAs
Review queue
4 open judgment calls
- ✓ Session replay
- ✓ Prompt retention
- ✓ Fraud cookies
synthrek
sources exports review
Disclosure packet
Review launch disclosures
vendor
Stripe
vendor
Supabase
vendor
PostHog
vendor
Resend
Tax breakdown
Apple Privacy Details
Purchase history, identifiers, user content
What reviewers ask
Google Data Safety
Financial info, app activity, messages
Company costs
GDPR / cookies
Processors, analytics cookies, AI prompts
Surfaces
One stack, four outputs
- • Policy draft
- • App Store notes
- • Play Console notes
Source proof
Sources travel with clauses
- • S-003 Stripe
- • S-014 Google
- • S-021 OpenAI
stack.synthrek S
Up next
Cookie review
duePostHog and Stripe.js may need a consent decision for EU visitors.
Stripe
payments
Supabase
auth
OpenAI
prompts
Privacy disclosures break when your stack changes.
App stores ask different questions
Apple Privacy Details, Google Data Safety, and your hosted privacy policy use different language for the same underlying stack. Synthrek keeps those answers aligned.
Vendors trigger quiet disclosure work
Stripe fraud cookies, Supabase auth sessions, PostHog analytics, and LLM prompt handling can change what you need to disclose before launch.
Templates do not know your product
A copied policy can sound finished while missing the services that actually touch user data. Synthrek starts from the stack, not a blank legal template.
Key features
Everything to build the disclosure packet.
Stack intake
Pick the services your app actually uses
Start with common indie stacks: payments, auth, analytics, transactional email, hosting, AI APIs, and cookies.
Stripe ✓
Supabase ✓
PostHog ✓
OpenAI ✓
Draft packet
Generate docs as a connected packet
Privacy policy clauses, app-store notes, processor entries, and review flags are drafted together so they do not drift.
privacy-policy.md ✓
apple-notes.csv ✓
google-data-safety.md ✓
Source trail
Keep official sources beside claims
Each sensitive sentence points back to a platform doc, regulator page, vendor privacy policy, or DPA page.
S-001 Apple ✓
S-006 GDPR ✓
S-012 Stripe ✓
S-024 Anthropic ✓
Review flags
Separate drafts from judgment calls
Cookie banners, session replay, AI prompts, regional transfers, and ad-tech get marked for review instead of hidden in confident copy.
check cookies ✓
review prompts ✓
confirm region ✓
How it works
From vendor list to review packet in three steps.
01
Enter your stack
Choose vendors and describe the data your app stores, sends, or analyzes.
02
Map disclosure surfaces
Synthrek lines each service up against Apple, Google, GDPR, CCPA, and cookie questions.
03
Draft and review
Export cautious wording, source IDs, and a review list for counsel or your launch checklist.
Why builders choose it
Built for indie launch pressure, not enterprise legal theater.
Less launch-week guessing
See why a disclosure answer exists before you paste it into App Store Connect or Play Console.
Cleaner counsel handoff
Send a compact packet with vendor rows, source links, and unresolved questions.
Safer edits when the stack changes
Adding PostHog, OpenAI, or Stripe later becomes a mapped update, not a full rewrite.
No fake certainty
The product labels example wording, confidence, source dates, and review flags plainly.
FAQ
The questions that matter before launch.
Is Synthrek legal advice?
No. Synthrek creates educational draft material from primary sources and vendor docs. Review official requirements and consult counsel before publishing production policies.
What does the preview include?
A sample stack map, draft privacy-policy clauses, Apple and Google disclosure notes, processor-list notes, cookie review points, and source IDs.
Can it guarantee that my app is compliant?
No. The goal is to reduce missing or inconsistent disclosure work. Some choices depend on your exact implementation, jurisdiction, and legal review.
Which stacks are best suited first?
Small web and mobile apps using tools like Stripe, Supabase, PostHog, Resend, Vercel, Cloudflare, OpenAI, Anthropic, Sentry, and similar SaaS vendors.
Is the product live?
The public site is a static marketing and research site. The full app is planned separately if the organic validation signal is strong enough.
Preview
Get a source-cited preview for your stack.
Send the vendors you use and what your app does. Synthrek can return a small disclosure map and the questions that need review.
hello@synthrek.com
Get preview
Sample wording only. Not legal advice.
Research
Launch checks from the blog.
how-to confidence medium
Apple Privacy Manifest files explained for indie iOS developers in 2026
What goes inside a PrivacyInfo.xcprivacy file, why Apple now expects one for many SDKs, and how a solo iOS developer can map their stack to the four required arrays without guessing.
template confidence medium
Google Play Data Safety form for solo devs: a row-by-row example
An example walkthrough of Google Play's Data safety section for an indie app that uses Stripe, Supabase, PostHog, and Resend — with the categories Google's documentation defines and cautious wording where the docs leave room for judgement.
checklist confidence medium
What disclosures Stripe, PostHog, Supabase, and OpenAI typically require in your privacy policy (with example wording)
A vendor-by-vendor walk-through of which data Stripe, PostHog, Supabase, and OpenAI handle, the processor entries each vendor's own docs ask you to include, and example wording you can adapt for your own privacy policy.