SAYUK · SOFTWARE FOR THE EV ERA AND THE KNOWLEDGE FIRM

Read the battery. Remember the business.

EVDS reads a used EV's battery over OBD and grades it against the UN's durability floor. Cortex gives a firm one memory that answers with sources, and only what each person is allowed to see.

Explore EVDS Explore Cortex

EVDS 11,600+ Battery scans recorded

EVDS 29 EV configurations profiled

Cortex 2 Live connectors: Drive and Gmail

Sayuk EVDS evds.sayuk.cloud Live

Tata Punch.ev 102 cells · LFP

State of charge: 56.4%; Measured
Cell spread: 5mV; Measured
Sigma: 0.99mV; Derived
Efficiency: 7.1km/kWh; Modelled

Lowest cell #51 in 21% of scans, against 1% by chance.

Sayuk Cortex cortex.sayuk.cloud Pilot

Question

Why did we treat routine engineering differently for Globex and Harlow on the R&D credit?

Answer

The distinction was documented for Harlow but never written down for Globex, and by September it's become a live, unresolved question.

1#tax-prep — Globex R&D credit question
2R&D credit study — Harlow Devices
3#tax-prep — are we consistent on R&D?

10 products · the honest ledger

10 products,
in honest order.

Two lead: EVDS and Cortex. The other eight share one account and one substrate underneath. Each entry carries its true state, and we don’t inflate the ladder.

Sayuk EVDS evds.sayuk.cloud Live

The battery of a used EV, read from the car and graded against a published floor.

Plug an OBD adapter in and EVDS reads state of health, the weakest cell and the controller’s identity, then judges health against the UN GTR 22 floor for that car’s mileage. Every figure is labelled measured, derived or modelled. Built for resellers, service centres and owners, with custom dashboards and system integrations built to order.

Explore EVDS Open the app → Trade brochure (PDF)

Live 29 EV configurations across 6 brands

Sayuk EVDS evds.sayuk.cloud Live

Tata Punch.ev 102 cells · LFP

State of charge: 56.4%; Measured
Cell spread: 5mV; Measured
Sigma: 0.99mV; Derived
Efficiency: 7.1km/kWh; Modelled

Lowest cell #51 in 21% of scans, against 1% by chance.

Sayuk Cortex cortex.sayuk.cloud Pilot

Institutional memory for firms that run on knowledge.

Cortex compiles a firm’s documents, threads and mail into what was decided, who owns it and where anyone recorded why. Answers cite their sources, respect each person’s permissions and stay inside your own boundary.

Explore Cortex

Sayuk Cortex cortex.sayuk.cloud Pilot

Question

Why did we treat routine engineering differently for Globex and Harlow on the R&D credit?

Answer

The distinction was documented for Harlow but never written down for Globex, and by September it's become a live, unresolved question.

1#tax-prep — Globex R&D credit question
2R&D credit study — Harlow Devices
3#tax-prep — are we consistent on R&D?

Sayuk Edge trading.sayuk.cloud Live

A systematic F&O stack, live on real money.

Trading our own capital across NIFTY, BANKNIFTY and SENSEX since 6 May 2026. Backtest framework, paper sandbox, and a Kite (Zerodha) execution connection. We share the architecture; we don't offer investment advice.

Read the architecture

Disclaimer. Sayuk is not a SEBI-registered investment adviser or research analyst. The figures shown are historical backtest results, not advice or a performance guarantee. Past performance does not indicate future returns. Markets carry risk.

Sayuk Edge trading.sayuk.cloud Live

EQUITY CURVE · 1Y BACKTEST +46.0%

+46% 1y backtest

2.83% max DD

63.8% win rate

2.93 profit fctr

Sayuk Tax tax.sayuk.cloud Live

Free ITR filing, from a Zerodha statement to a valid XML.

Drop the Zerodha .xlsx, and the tax engine classifies every capital-gains row, picks ITR-1, ITR-2 or ITR-3, computes the refund, and generates the XML to upload. No fee.

Open Sayuk Tax →

Sayuk Tax tax.sayuk.cloud Live

Zerodha tax P&L capital-gains.xlsx ✓

Scrip	Term	Gain
INFY	LTCG	₹18,420
HDFCBANK	STCG	₹6,240
NIFTY F&O	STCG	−₹3,110

ITR-2 ready Refund ₹2,140

Free · ITR-1 / 2 / 3 · capital gains auto-classified

Sayuk EVCS evcs.sayuk.cloud In design

Find EV chargers, or start your own charging station.

One map for drivers. One dashboard for station operators. OCPP, pricing, reconciliation — in design.

Explore EVCS

Sayuk EVCS evcs.sayuk.cloud Design

STATION FINDER · LIVE

Nearest chargers

42 stations online

Station	Slots	Type	Status
Jubilee Hills Hub CS-001	4/6	DC Fast	active
HITEC City Plaza CS-002	8/8	AC Level 2	full
Kondapur Gateway CS-003	2/4	DC Fast	active

OCPP 1.6J · Real-time pricing · Auto-reconciliation

In alpha · all publicly accessible

Sayuk Shield shield.sayuk.cloud Alpha

FAMILY HEALTH VAULT

My family

4 members

Mother Rx · appointments shared

Spouse All scopes shared

Father Pending consent pending

Each side controls scope · DPDP audit trail by default

Sayuk Shield

Alpha

shield.sayuk.cloud

Family health vault with per-relation consent and a DPDP audit trail.

Explore Shield →

Sayuk Pact pact.sayuk.cloud Alpha

SAVINGS CIRCLE · ROUND 4 OF 12

Year-End Circle 2026

₹60,000 this pool

Mara Jonas Lena +9

TRIP SPLITTER · WEEKEND

You are owed+₹2,480

Settle to Mara₹1,150

Tracks state · never touches your money · 30 members max

Sayuk Pact

Alpha

pact.sayuk.cloud

Savings circles + a trip splitter. Tracks the math, never touches the money.

Explore Pact →

Sayuk Trove trove.sayuk.cloud Alpha

Folding treadmill · 2024

2 km away · seller masked till exchange

Sell now₹12,400

Rent / month₹980

From ₹22,000 · 18 mo · 56% retained

Depreciation engine quote · UPI escrow · 6-digit exchange PIN

Sayuk Trove

Alpha

trove.sayuk.cloud

Neighbourhood marketplace. Depreciation pricing, masked identity, UPI escrow.

Explore Trove →

Also shipping · in daily use at a hospital

Sayuk Tend hms.sayuk.cloud Shipping

RECEPTION · TODAY 10:42

Front-desk queue

₹14,820 collected

Token	Patient	Status
OP-2026-031	Sophie Lambert Dr. Helen Mercer	In room
OP-2026-032	Marcus Reed Dr. James Cole	Called
OP-2026-033	Elena Voss Dr. Helen Mercer	Waiting

Same ledger as pharmacy & doctor · zero double-entry

Sayuk Tend

Shipping

sayuk.cloud/hms

Clinic and GST pharmacy on one ledger, from the reception desk to the invoice.

Explore Tend →

The surface

Sayuk One Live

The wrapper, not a sibling app. One unified shell over the whole suite, where the shared substrate becomes visible.

Verified once. Every product, one signed-in surface.

Open the surface

Sayuk One one.sayuk.cloud Live

Nora Vance +91 ••••• 41 · one identity

Verified

CONSENT LEDGER · FAMILY GRAPH

Mother Rx · appointments shared

Spouse All scopes shared

Pharmacy Dispense only scoped

One login · one consent ledger · every product reads it

The thesis

One substrate. Every product reads from it.

One identity, one family graph, one address book, one consent ledger, one WhatsApp-native notification mesh. Built once, then shared across the whole portfolio.

01

One identity, every product

Verified once. The same login signs in to Tend at the reception desk, Edge on the F&O book, and Tax at filing time — not seven separate signups.
02

Consensual family graph

Add a parent, child, or guardian; they confirm. Shield reads the same graph per-relation, so a health record is shared by consent, revocable any time.
03

One consent ledger

Every cross-product data access is logged against one ledger. You can see who looked at what, when, and under which grant.
04

Notification mesh, WhatsApp-native

One messaging spine reaches the person where they already are. A Tend appointment, an Edge fill, a Pact reminder — same mesh, same number.