Picture this

Who it is for

Ngozi organizes a Saturday beach cleanup in Lagos. Volunteers check in with geotagged photos and a co-volunteer witnesses each one, and the city NGO later uses the record to give the top helpers internship priority.

Two ways to own it

What you get

Base$179

$45 deposit to reserve

Event setup, geo plus photo check in, witness cosign, deed credential, organizer dashboard.

You choose: chain
You choose: name and logo
You choose: accent color
You choose: deed types

Customfrom $1,200

Built around you

Reshape it entirely: new features, your flows, your brand end to end, integrations you need. We scope it with you.

Everything in Base
Custom features and design
Priority build

Why it is new

What exists today, and what this does differently

What is new

Each piece exists; a single organizer app combining photo, place and human witness is a modest combination.

Closest things out there

ImpactX (Celo) mints AI-verified Proof-of-Impact NFTs from photos of good deeds, and ImpactChain (ETHGlobal) uses DAO witness signatures; TruthCam anchors photo GPS hashes.

Checked with web searches in October 2026. A search is not proof that nothing similar exists, and the market moves fast, so we recheck before every build.

What it unlocks

The human in it

Gives your real world kindness a lasting record.

The Regatta Board

Races it can enter

grant · Gitcoin · upcoming

Gitcoin Grants rounds

quarterly-ish rounds; next round dates unknown

Official page ↗

Public goods fit; open-source required generally.

Their rule on existing code: Existing open-source projects OK (generally required)

grant · Polygon · rolling

Polygon Community Grants

seasonal; current season unknown

Official page ↗

Existing projects OK.

Their rule on existing code: Existing projects OK

What you own

The whole app, not a starter kit.

The complete Deed Witness app: volunteers check in with a fresh photo, a place and a co-volunteer witness, and every good deed becomes a private, signed record they can share with NGOs, with a USDC paywall built in.

Base price · $179

The user app, complete

Every buyer gets the same finished app. Basic branding and copy changes come through a quick form.

Three step onboardingHome

Shown once: a photo taken here, a friend who saw it, a record that travels.

Today card and witness requestsHome

One next action, live stats and a one tap 'Yes, I saw it' for friends nearby.

In-app photo check inCheck in

Deed type, in-app camera, zone map and a live witness prompt with one or two witnesses.

Duplicate, drift and ring checksCheck in

Reused photos refused, GPS drift vouched by a witness, friend-only rings held for review.

Onchain deed receiptsDeeds

Attestation hash, witness signatures, coarse place cell and block; photo and exact GPS stay private.

Deed history and shared linksDeeds

Every check in with its status, plus expiring history links for NGOs, schools and employers.

NGO ready exportDeeds

Signed PDF and verify code of witnessed Saturdays. Gated behind Volunteer Plus.

Season calendar and RSVPSeason

Tide chart of witnessed Saturdays, job picker, lock in and reminders.

Impact insightsSeason

Your bags against the crew average over the season. Gated behind Volunteer Plus.

Plans and USDC checkoutMe

Volunteer, Volunteer Plus and Organiser tiers, paid in USDC on Base with a receipt, or a group code.

Open the full app demo

Add-on

Owner console

Your admin side: revenue, paywall editor, users, rules and the agent log.

Revenue and paywall editorRevenue

MRR, NGO export fees, tier names and prices, gated features and payment methods, live.

Events and flag reviewEvents

Zone, turnout against RSVPs, a review queue to approve or keep off, season export and recap draft.

RulesRules

Radius, witnesses, chain, face blur, duplicate, ring and drift checks, gas sponsorship, leaderboard.

Check in agent logAgent

What failed and how it adapted, reacting to the rules you set, plus running costs.

Roadmap requestsRoadmap

v2 and v3 builds with scope and add-on prices, one tap request.

Top-up

Growth and referrals

Referral and growth mechanics, switched on when you are ready to grow.

Growth loops and referralsGrowth

Cohorts, school club Saturdays, witness invites and a two sided free month referral.

The money path, built in

How it earns for you

Checking in and witnessing are free forever. Volunteers pay a small monthly fee for exports and insights, organiser groups pay monthly to cover every member, and NGOs pay per season export.

VolunteerFreeCheck ins, witness taps, deed history, season calendar, 1 shared history link

Volunteer Plus$3 a monthNGO ready export, open receipts on shared links, impact insights, unlimited links

Organiser$24 a month per groupPlus for every member, sponsored gas, flag review, season export to partner NGOs

Season export to an NGO, $15 each. Gas is under one cent per deed and the owner chooses whether to sponsor it.

Prices are yours to set. Illustrative, not a promise of income.

Growth loops, built in

How it spreads

Every check in needs a witness, so each volunteer brings a friend
School club Saturdays onboard a class at once, with guardian consent
Weekly recap posts shared by organisers in community chats
NGOs that read exports ask their other partner groups to join
Two sided referral: a friend's first witnessed deed gives both a free month

Roadmap · build the next phase with us

Where it goes next

v1 included

The full volunteer app

In-app photo check in with zone and witness
Duplicate photo, drift vouch and ring checks
Deed history, receipts and share links
Season calendar, RSVP and share card
Paywall with USDC checkout

Included

NGO portal and verify API

NGO accounts that read season exports
Verify endpoint with per check billing
Multi event organisers and co-leads
SMS check in for feature phones

Add-on from $450

City season and open schema

City wide season across many groups
Open deed schema for schools and councils
Guardian consent flow for minors
Sponsor matched supplies per witnessed deed

Add-on from $950

For investors and grant reviewers

The pitch, ready

Kindness with a receipt: every good deed is checked in with a photo, a place and a witness, and saved as a record that outlives the group chat.

Problem: Volunteer groups and the NGOs that rely on them cannot tell who really shows up. Sign up sheets and group chat photos are easy to pad, and the people who come every week get no lasting credit.

Solution: An organiser-first app where a deed only counts with a fresh in-app photo, a GPS fix inside the event zone and a nearby co-volunteer's signature, with duplicate and ring checks and private storage for photos.

Why now: Attestations cost under a cent on Celo, Base and Polygon, embedded wallets hide seed phrases, and NGOs increasingly need verified volunteer data for internships and grants.

Market: Millions of volunteer groups, school clubs and community cleanups, plus the NGOs, scholarship boards and employers who ask for proof of service.

The ask: Pilot partners: two NGOs and ten organiser groups for one season, and a small grant to sponsor gas for the first 10,000 deeds.

Funding is never guaranteed. Check each program's rules.

For hackathons and demo days

Your 2 minute demo

Home: meet Tunde, 19, who says he has come 14 Saturdays. Tap Check in now.
Check in: run the fresh photo check in. Halima confirms and the deed is saved with a receipt.
Check in: try the reused photo and the friends only ring. One is refused, one is held.
Events (owner): Ngozi reviews the held ring and approves or keeps it off.
Rules (owner): switch the radius to 100 m or turn off drift vouch, rerun the drift check in.
Deeds: share the history with Clean Coast NGO; the export is gated behind Volunteer Plus and paid in USDC.
Revenue (owner): edit the Plus price and see it on the Plans screen, with incoming USDC payments.
Growth and Roadmap (owner): run a club Saturday, then request the NGO portal build.

Many hackathons require code written at the event. See the Regatta Boardfor each race's rule.

Make it entirely yours

Custom work covers your own deed types and branding, other chains or attestation schemas, NGO and council integrations, guardian consent flows and anything beyond the roadmap, scoped on a call from $1,000.

Custom from $1,200

BLUEPRINT

Why it matters and how it really works

The need

Volunteer groups and the NGOs that rely on them have no trustworthy record of who actually showed up. Sign up sheets and group chat photos are easy to pad, and the volunteers who come every week get no lasting credit for it when an internship, reference or scholarship asks for proof.

What exists and what is new

Each piece exists. ImpactX on Celo mints AI-verified Proof-of-Impact NFTs from photos of good deeds, ImpactChain (an ETHGlobal project) uses DAO witness signatures, and TruthCam anchors photo GPS hashes. Research verdict: rare, medium novelty. What this app adds is one organiser-first flow that needs all three at once, a fresh in-app photo, a place inside the event zone, and a nearby human witness, plus ring and duplicate detection. It is a modest combination, not a new mechanic.

The data it runs on

Per check in: a perceptual hash of an in-app photo, a coarse location cell and event zone id, the witness's signature, the deed type and time. The photo and exact GPS are stored privately for the organiser and deleted after the season. Only hashes, cells and signatures go onchain.

1.The mission

Give every real world act of kindness a lasting record, so the people who keep showing up are finally seen.

2.Why people can't resist it

Seen by a friend A deed only counts when someone who was there says so. Volunteers like being the witness as much as being witnessed.

The season calendar Witnessed Saturdays fill in like a tide chart. Missing one feels like breaking a streak with friends.

A record that travels Volunteers can share a deed history with an NGO, school or employer, and it outlives any group chat.

3.How it works for real

Wallets: Privy embedded wallets with phone or email sign in. Volunteers never see a seed phrase; gas is sponsored by the organiser's paymaster on Celo, Base or Polygon.

Event setup: The organiser draws a zone, picks deed types, witness radius and count. The event is a small onchain record with the zone id and rules hash.

Check in: The volunteer takes the photo inside the app. The phone computes a perceptual hash and checks the GPS fix against the zone, then requests a witness.

Witness: A different checked in volunteer within the radius gets a prompt and signs a confirmation. If GPS drifts, the witness can vouch for the spot and the organiser sees a flag.

Attestation: The deed is saved as an EAS attestation (or a similar schema on Celo) holding the photo hash, location cell, witness signature and deed type.

Fraud checks: A server compares photo hashes to past deeds to catch reposts, and a simple graph check flags pairs who only ever witness each other. Nothing is auto-punished; the organiser decides.

Summaries: A small model such as Gemini Flash or Claude Haiku via OpenRouter drafts the organiser's weekly recap from structured data. It never edits records.

4.Cost per use and pricing

An attestation on Celo, Base or Polygon is usually well under one cent in gas. Perceptual hashing runs on the phone. Private photo storage is about $0.02 per GB per month. Example month for an organiser with 4 events and 200 check ins: about $1 to $3 sponsored gas, $1 storage, $2 model, plus around $20 shared hosting.

Volunteer Free

Check in, witness others and keep a shareable deed history.

Organiser $9 a month

Unlimited events, zone and witness rules, flags, and a season export.

NGO $49 a month

Read access across partner groups, verified volunteer reports, and private shortlists.

5.Growth loop

Every check in needs a second person, so each volunteer pulls in a friend. Organisers share season recaps in their communities, and NGOs that rely on the records ask their other partner groups to use it.

6.Risks and guardrails

Privacy and minors: Photos can show faces, including children. Other faces are blurred by default, photos stay private, and events with minors need guardian consent.

Collusion: Friends can witness each other at a fake event. Zone checks, ring detection and organiser review make it harder, not impossible.

GPS limits: Cheap phones drift. A witness can vouch for the spot, and the organiser can resolve flags, so honest people are not shut out.

Misuse of the record: A deed count is not a measure of a person. NGOs should use it as one input, and the app should never rank people publicly by default.

Safety: Location data can expose where people gather. Only coarse cells go onchain, and exact GPS is deleted after the season.

7.Build order

Privy sign in and organiser event setup with a map zone
In-app photo check in with on-device perceptual hash
Witness prompt and signature within a radius
EAS deed attestation with sponsored gas
Duplicate photo and witness ring flags for the organiser
Volunteer deed history and a season export for NGOs

8.Where this is going

Now
One organiser runs Saturday cleanups with witnessed check ins and a clean season record.
Next
More deed types and cities, with NGOs reading verified volunteer histories across groups.
Later
Schools and employers accept a witnessed deed history the way they accept a reference letter.
The world it builds
Showing up for your community leaves a mark you own, and the people who do it most get noticed.

Costs and tools are estimates at the time of writing. General information only, not legal or financial advice.

OWNER PLAYBOOK

Own it, then chart your voyage

Nine routes from one vessel. Tap a port to open its chart.

Why own Deed Witness

Volunteer hours usually live in a spreadsheet that disappears when the organizer moves on. Deed Witness records each good deed with a geotagged photo and a co volunteer's signature, then issues a credential the volunteer keeps forever. Owning it makes you the organizer whose records count: NGOs, schools and sponsors can trust your events, and the platform fees and partnerships are yours.

What’s stopping you?

“I can't code. Can I run this for my events?”

Yes. Event setup, geo plus photo check in, witness cosign, deed credentials and the organizer dashboard are built. You set the chain, name, colors and deed types, then deploy from your wallet with the guide.

“Will volunteers bother with wallets?”

Many will not want to at first. Use the simplest login the app supports and explain that the credential is theirs to keep. Run check in at the event with a helper so nobody gets stuck.

“Can't people fake photos?”

A single photo can be faked. That is why each deed needs place, time and a second volunteer's cosign. It is much harder to fake, not impossible, so describe it honestly.

“What about volunteers' privacy and location?”

Store only what is needed, let volunteers choose what is public, and avoid exact home locations. For minors, get guardian consent and keep profiles private.

“Who pays for this?”

NGOs, schools and companies running volunteer days. They need trustworthy impact records for reports and funders.

The million-dollar ladder

NGOs, schools and companies pay per event or per month for verified volunteer records and impact reports. Sponsors pay to reward top helpers.

$100

$4,500

$48,000

$85,000

First 10 organizers

10 organizers

$10 per month

Local NGO network

150 organizers

$30 per month

Schools and company volunteer programs

800 organizations

$60 per month

Million dollar run rate

1,000 organizations

$85 per month

Sell impact reports funders accept, not just check ins.
Company volunteer day packages billed per event.
Sponsor rewards for top volunteers (race entries, internships), which bring organizers.
Public goods funding rounds for the free tier.

Illustrative stages, not a forecast. Results depend on you and the market; nothing here is guaranteed.