The Marketplace-Backed Build Log
The UK modified car build log & marketplace — log every mod, track every penny, prove your build.
Document every modification and every mile. Buy and sell parts from real builds. By COLLINGHAMCO — the only car logbook with a marketplace inside it.
Private by default. You own your data. Export anywhere as PDF, CSV or JSON — your build follows you, not us.
THE COLLINGHAMCO FAMILY
Explore our dedicated build experiences across the UK modified car scene
PLAY & RATE
More than a build log. Rate cars, collect cards and battle the community — all built around real UK builds.
THE COOL WALL
Rate modified cars Subzero to Seriously Uncool. Browse member-curated walls and cast your verdict.
RATE CARS
COMMUNITY POLLS
Vote on The Grand Tour, Top Gear and the cars that define UK car culture. One vote per member, results live.
CAST YOUR VOTE
LAP BOARD
Log your track-day lap times and climb the UK leaderboards. Real circuits, real member builds, real pace.
SET A TIME
MONTHLY CHALLENGES
Enter themed build challenges like Best Interior or Highest Horsepower. The community votes the winners.
ENTER A CHALLENGE
TOP TRUMPS
Turn real builds into printable Top Trump cards. Collect them, share them, or order a physical pack.
BUILD A PACK
DECK WARS
Battle your collected Top Trump cards head-to-head — Quick Match, Async Duels and real-time Live Duels.
ENTER THE ARENASEARCH THE PARTS MARKET
Find parts, vehicles & services from the MODLOG community. All users welcome.
REAL LOGS. REAL BUILDS.
Real builds by real enthusiasts. Every mod logged, every penny tracked.
TOP BUILDS
Most popular car builds in the community — ranked by total likes received.
R34 Four Door
1999 Nissan Skyline R34 GT-T
The Schmiss
1989 BMW E30 325i
MK2 GTI
1989 Volkswagen Golf Mk2 GTI
Miss Silvia
1996 Nissan 200SX S14
AP1 GT
2003 Honda S2000 AP1
Skittle
1999 Mazda MX-5 NB
RECENT ACTIVITY
Latest mods logged by members of the MODLOG community.
ATST DELUXE Bucket Seat Black Synth Leather Suede
1996 TOYOTA · That Green MR2
Wheel Lug Nuts
1996 TOYOTA · That Green MR2
Wheel Lug Nuts
1996 TOYOTA · That Green MR2
Profusion Exhausts Single Exit Stainless Steel + Resonator
1996 TOYOTA · That Green MR2
Clutch Line Replacement
1996 TOYOTA · That Green MR2
Spark Plugs
1996 TOYOTA · That Green MR2
Ignition Coil Pack
1996 TOYOTA · That Green MR2
Toyo Rear Tyres
1996 TOYOTA · That Green MR2
Aluminium Intake Hose
1996 TOYOTA · That Green MR2
Quad Light Wiring Loom
1996 TOYOTA · That Green MR2
MARKETPLACE
Buy parts straight from real builds. Sell your old upgrades. Find your next project car. Pro members list for free.
PARTS
NEW BLACK STITCH FULL CENTRE CONSOLE LEATHER COVERS FITS PORSCHE BOXSTER 986 96-04
£147.00
Notts
PARTS
LTG Pair LED DRL Lightbar Headlights Ford Fiesta 7 TFL H7 / H1 08-12 Black LHD
£97.00
Worksop, Notts
PARTS
AutoStyle Sport Seat — Black PU Leather / Red Stitch Recliner
£137.00
Worksop, UK
PARTS
UK ZUNSPORT ZPR85619P Black Front Grille 3pcs PORSCHE CARRERA 992 C2 C2S C4 C4S
£187.00
Worksop, UK
PARTS
LTG Pair LED Halo Angel Eye Headlights Audi A4 B6 8E Sedan Avant 00-04 LHD
£144.00
Worksop, UK
PARTS
Oneway Bonnet Air Vents Grilles VW Amarok 2022+ HD Body Styling Matte Black
£57.00
Worksop, UK
PARTS
UK Windbooster GT151L WINDBOOSTER GT BT App Throttle Controller T5 T6 Ibiza 6
£47.00
Worksop, UK
FREE FOREVER · NO CREDIT CARD REQUIRED
MEMBER SPOTLIGHT
WEEK 38Each week we cycle through the highest-voted member Cool Walls. Get yours voted up to take the spotlight — build & share your wall.
WHY MODLOG?
Built for Modders.
Not Just Maintenance.
Other apps track your service history. MODLOG tracks your build story.
The Others
- ✕Service reminders only
- ✕No modification tracking
- ✕No parts cost breakdown
- ✕No public build profile
- ✕No community or leaderboard
- ✕No affiliate "Where to Buy" on parts
- ✕No build provenance when you sell
MODLOG
- ✓Full modification log with categories
- ✓Total build cost tracked to the penny
- ✓Receipt scanning — snap & log instantly
- ✓Shareable public build profile
- ✓Community leaderboard & Marketplace
- ✓Affiliate parts links on every mod (Pro)
- ✓Sell your car with its full documented history
BUILT ON TRUST
Your build log is yours. We never lock it behind a subscription you can't leave.
PRIVATE BY DEFAULT
New builds stay private. You choose when — and if — they go public. No public feed pressure.
YOU OWN YOUR DATA
Mods, mileage, receipts and photos are yours, not ours. Close your account and walk away with all of it.
EXPORT ANYWHERE
One click to PDF build report, CSV mod file or full JSON backup. Prove your build when you sell the car.
CHOOSE YOUR TIER
FREE
- ✓ 1 Vehicle
- ✓ Unlimited Mods & Mileage Logging
- ✓ Photo Gallery & Before/After
- ✓ Full Spend Tracking
- ✓ Mileage Ledger
- ✓ Community Feed, Likes & Comments
- ✓ Cool Wall Voting & Top Trump Collection
- ✓ Deck Wars Quick Match
- ✓ Marketplace Browsing & Buying
PRO
- ✓ Everything in Free, plus:
- ✓ Unlimited Vehicles
- ✓ Public Build Page — modlog.online/builds/your-slug
- ✓ "Where to Buy" Links on Every Mod
- ✓ PDF Build Report — prove your build when you sell
- ✓ Spend Analytics, Yearly Spend & Investment Breakdown
- ✓ Modification Stats & Build Comparison
- ✓ MOT & Service Reminders
- ✓ AI Receipt Scanning
- ✓ Export Backup — PDF, CSV & JSON
- ✓ Member Cool Walls — curate & share your own
- ✓ Priority Support
Powered by AWIN & eBay Partner Network
GET STARTEDTRADE
- ✓ Everything in Pro, plus:
- ✓ Branded Seller Storefront
- ✓ Verified Trade Badge
- ✓ Trade Profile & Business Listings
- ✓ Sell Parts & Vehicles in the Marketplace
- ✓ Offers, Enquiries & Trade Message Center
- ✓ Proximity Lead Generation — found by location
- ✓ Event Hosting & Promotion Tools
- ✓ Sponsored & Boosted Listings
- ✓ Sponsorship Request Tools
- ✓ Trade Analytics Dashboard
MEMBER DEALS
Gravity Performance
UK performance & styling parts specialists. Established since 2004. Thousands of products for road & track.
Shop Gravity Performance →ADDirenza
High-performance aftermarket parts for road & track. UK-based, unbeatable prices on brakes, exhausts & more.
Shop Direnza →ADDemon Tweeks
Performance & motorsport parts — race-proven. Trusted by racers and road drivers alike since 1971.
Shop Demon Tweeks →ADJapspeed UK
Cat-back exhausts, manifolds & performance parts. Free UK delivery on orders over £100.
Shop Japspeed UK →ADFixMyCar
Find a trusted local mechanic or garage. Compare quotes, read reviews, and book instantly.
Find a Garage →ADRoofBunk
Roof boxes & carriers for every adventure. Premium storage solutions for cars, vans & SUVs.
Shop RoofBunk →AD4x4 Predator
Bull bars, snorkels, roof racks & 4x4 accessories. Specialists in off-road performance upgrades.
Shop 4x4 Predator →Affiliate links — MODLOG may earn a commission at no extra cost to you.
MODLOG VS THE OLD WAY
Spreadsheets track cost but have no marketplace. Instagram has photos but no provenance. MODLOG is the single record that connects them.
WHAT IS MODLOG?
MODLOG is the social platform for UK car enthusiasts and modification traders. Document your vehicle evolution, track spending, and connect with like-minded builders across the community.
From first mod to legendary build—MODLOG is where passion becomes portfolio.
Tracked
Logged
Immortalized
WHY MODLOG?
TRACK INVESTMENT
Monitor every penny spent. Visualize ROI. Know your costs.
SHARE YOUR BUILD
Publish builds publicly or keep private. Reach enthusiasts.
EARN RECOGNITION
Progress through tiers. Get badges. Climb the leaderboard.
CONNECT & NETWORK
Join the community. Follow builders. Message traders.
SUPPLIER ECOSYSTEM
Rate & review workshops. Discover trusted suppliers.
STAY ORGANIZED
Service reminders. Photo galleries. Build PDFs.
PROSELL YOUR CAR OR PARTS
Pro members list vehicles and parts directly on MODLOG. Reach thousands of buyers who already know their cars.
PROBUY FROM REAL BUILDS
See a part on someone's build? Buy it. Every mod links to where it was sourced — making it easy to replicate or upgrade.
PROEXCLUSIVE MEMBER DEALS
Unlock discounts on insurance, parts & accessories via our AWIN partner network. Real savings built into every Pro subscription.
HOW IT WORKS
CREATE YOUR PROFILE
Sign up free. Set your vehicle details. Pick your builder style.
LOG YOUR MODS
Add modifications as you do them. Upload photos. Track costs & suppliers.
BUILD YOUR PORTFOLIO
Watch your build evolve. Gather likes & comments. Unlock achievements.
CONNECT & EARN
Go Pro to unlock analytics. Share publicly. Monetize with affiliates.
FREQUENTLY ASKED
Everything you need to know before you start logging your build.
MODLOG is a free UK car modification build log with a built-in marketplace. You log every mod and every mile, track what you spent, and can buy or sell parts from real builds. It is made by COLLINGHAMCO LTD.
READY TO LOG YOUR BUILD?
Join thousands of builders documenting their journey.
PART OF THE COLLINGHAMCO FAMILY
Tools built for drivers, buyers, garages and traders — by COLLINGHAMCO LTD.
ADVRMCheck
£5.47 FULL VEHICLE HISTORY & FINANCE CHECK
Visit → vrmcheck.uk
RecallIQ
STOP LOSING MOT CUSTOMERS TO KWIK-FIT
Visit → recalliq.online
MONTHLY DROP ✦ PORSCHE
Drive-Box
THE PORSCHE MYSTERY BOX — FROM £34.99/MO
Visit → drive-box.shop
RepairIQ
CALCULATE MAX BID BEFORE YOU BID AT COPART
Visit → repairiq.onlineTHE UK'S CAR MODIFICATION LOG & BUILD LOG APP
MODLOG is the free online logbook for modified cars — built by COLLINGHAMCO LTD for UK car enthusiasts who want to document every modification, track every mile, and prove the value of their build. Whether you run a daily-driven hot hatch or a full project car, MODLOG is the car modification tracker that turns your garage journey into a shareable portfolio.
DOCUMENT YOUR BUILD
Log every mod with photos, costs and suppliers. MODLOG is your car build log — a permanent record of your vehicle's evolution from stock to built.
TRACK YOUR INVESTMENT
See exactly what your modified car is worth. MODLOG totals your spend by category and over time, so you know your build's true value when you sell.
BUY & SELL PARTS
A parts marketplace built into the build log. Buy from real builds, sell to enthusiasts who already know their cars — the only UK car modification app with a marketplace inside.
FREQUENTLY ASKED QUESTIONS
What is MODLOG?
MODLOG is a free UK car modification tracker and build log app by COLLINGHAMCO LTD. Document every modification and mile, track spending, buy and sell parts, and showcase your build to the community.
Is MODLOG free to use?
Yes. MODLOG is free forever — log one vehicle with unlimited mods, a photo gallery and full spend tracking at no cost. Pro and Trade tiers add unlimited vehicles, spend analytics and a branded seller storefront.
What can I do with MODLOG?
With MODLOG you can document vehicle modifications, track total investment, buy and sell parts in the marketplace, rate cars on the Cool Wall, collect Top Trump cards and battle in Deck Wars.
Can I export my car build log?
Yes. Your data is yours — export your full build log as a PDF build report, CSV mod file or JSON backup at any time. MODLOG never locks your build behind a subscription you can’t leave.
OVER 50 BUILDS ALREADY LOGGED. JOIN THE COMMUNITY.
LOG YOUR BUILD FREE