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IC3ST vs IS357 vs ONE Plus — which LockCar system is right for your vehicle?
Three products. £10 apart at entry. Worlds apart in capability at the top. Here’s exactly what each one does, who it’s for, and how to pick without second-guessing yourself.
Entry · Standalone
IC3ST
£139 product / from £300 fitted
The complete out-of-the-box solution. Standalone, app-controlled, proximity tag at 1.5m. No extra hardware needed.
View IC3ST →
Premium · 5m Range
IS357
£149 product / from £320 fitted
Everything in the IC3ST, plus 5m proximity range, Bluetooth, and smartwatch/smart ring as trust device.
View IS357 →
Flagship · Full features
ONE Plus
£199 product / from £380 fitted
4G remote, live camera, GPS+GLONASS, Face ID, and automatic night immobilisation. Fleet-grade in one device.
View ONE Plus →
Every product in the LockCar range is relay-based — zero ECU contact, zero CAN bus interference, zero compromise on the thing that matters most. The question isn’t which one is good. It’s which one fits your vehicle, your budget, and how much visibility you want over what’s protecting it.
This article is the one to read if you’ve decided on LockCar and want to make the right internal choice. If you’re still deciding between LockCar and another brand, start with our Ghost vs LockCar comparison → first.
Quick answer — which one should I buy?
If you’re in a hurry — here’s the one-line version for each type of buyer.
IC3ST
Most individual car owners. You want reliable relay protection, hands-free proximity disarming, app control, and a professionally fitted device without paying for features you won’t use. The IC3ST covers you completely.
IS357
BMW, Range Rover, Mercedes, Porsche owners — or anyone who parks away from home regularly. The 5m proximity range and smartwatch support make the car disarmed before you reach the door. Worth the extra £10 if you drive a premium vehicle.
ONE Plus
Anyone who wants remote visibility, automatic night protection, or recovery capability. If you want to see your car, lock your car, and track your car from anywhere — the ONE Plus is the only product that does all of this. Also the right choice for Range Rover, fleet vehicles, or cars parked in high-risk locations overnight.
IC3ST — the standalone entry
IC3ST
Standalone relay immobiliser · App + proximity tag · No MCU required
£139
From £300 professionally fitted
The IC3ST is the most complete out-of-the-box LockCar product for individual car owners. It doesn’t require a separate Main Control Unit — everything is built in. You get physical relay protection, wireless proximity tag disarming at 1.5m, a full Wi-Fi app, motion detection, and valet mode, all in a single device.
Type
Standalone — no MCU needed
Relay
20A physical engine cut
Proximity range
1.5 metres
Connection
Wireless 2.4GHz AES-128
Includes
1× TAG ID fob, motion sensor, Wi-Fi app
Voltage
12V and 24V compatible
- ✓ Physical relay circuit cut — zero ECU / CAN bus contact
- ✓ Hands-free proximity tag — disarms automatically as you approach
- ✓ Full Wi-Fi app — arm, disarm, monitor from your phone
- ✓ Motion detection — alerts if the vehicle is disturbed while armed
- ✓ Anti-hijack — immobilises after a set period if tag leaves range
- ✓ Valet mode — deactivates immobiliser temporarily for garage servicing
- ✓ App control: arm, disarm, stop engine command, valet toggle
- ✓ Works on cars, vans, HGVs, EVs, motorhomes — 12/24V
Ideal for
↑
When to step up to the IS357 instead: if you drive a BMW, Range Rover, or other high-value vehicle and want the car disarmed at 5m rather than 1.5m — or if you want to use a smartwatch or smart ring as your trust device rather than a fob.
IS357 — the premium step-up
IS357
Premium standalone · 5m proximity range · Bluetooth · Wearable support
£149
From £320 professionally fitted
The IS357 is the IC3ST with three meaningful upgrades: the proximity range extends from 1.5m to 5m, a Bluetooth module is added, and support for smartwatch and smart ring as trust devices is enabled. The result is a car that is disarmed before you reach the door — with or without the physical fob. At £149, it costs £10 more than the IC3ST. For high-value vehicles and premium drivers, that £10 is well spent.
Type
Standalone — no MCU needed
Relay
20A physical engine cut
Proximity range
5 metres (vs 1.5m on IC3ST)
Bluetooth
Included — wearable support
Trust device
Smartwatch, smart ring, or TAG fob
Voltage
12V and 24V compatible
- ✓ Everything in the IC3ST, plus the upgrades below
- ✓ 5m proximity range — car disarmed before you reach it
- ✓ Bluetooth module — enables wearable pairing
- ✓ Smartwatch or smart ring as trust device — wear it, walk up, done
- ✓ Physical relay — 20A circuit cut, zero ECU contact
- ✓ Full Wi-Fi app, motion detection, anti-hijack, valet mode
- ✓ Works on all 12/24V — cars, vans, EVs, HGVs
Ideal for
↑
When to step up to the ONE Plus instead: if you want to see a live camera feed of your car, track it via GPS in real time, remotely immobilise it from anywhere in the world, or have it lock down automatically at night without any manual action.
ONE Plus — the flagship
ONE Plus
4G remote · Live camera · GPS+GLONASS · Night auto-immobilise · Face ID
£199
From £380 professionally fitted
The ONE Plus is a different category of product. Where the IC3ST and IS357 are relay immobilisers with app control, the ONE Plus is a comprehensive security platform: relay immobilisation, 4G remote access, live camera feed, GPS+GLONASS tracking, automatic night-time arming, Face ID driver recognition, and cloud storage. Fleet-grade specification at a personal price — comparable commercial systems cost £1,500–2,500 per vehicle. The ONE Plus delivers the same capability at £199 because it’s manufactured directly rather than resold through a distributor chain.
Relay
20A physical engine cut
Connectivity
4G, Wi-Fi, Bluetooth
GPS
HYPER GPS+GLONASS
Camera
Live feed + cloud storage
Night mode
Auto-immobilise at preset hours
Driver ID
Face ID recognition
Subscription
Required for cloud/4G features
Voltage
12V and 24V compatible
- ✓ All features from IC3ST and IS357, plus everything below
- ✓ 4G remote access — immobilise, view, track from anywhere in the world
- ✓ Live camera feed — see what’s happening at the vehicle in real time
- ✓ GPS+GLONASS tracking — live location, route history, speed logs
- ✓ Automatic night immobilisation — car locks down at preset hours without any manual action
- ✓ Face ID driver recognition — engine won’t start if the face isn’t recognised
- ✓ Cloud storage — footage and logs stored remotely, not just on local SD
- ✓ Microphone and speaker — two-way audio via the app
- ✓ Additional relay — supports multi-circuit protection
- ✓ All standard features: hands-free, app control, motion detection, anti-hijack, valet
Ideal for
Suggested image
Three-product flat lay: IC3ST, IS357, and ONE Plus side by side on a dark surface, physically showing the size and component differences. Or: a phone screen showing the LockCar app with the live camera feed active, with a car visible in the feed. Caption: “The ONE Plus lets you see, lock, and track your car from anywhere — the IC3ST and IS357 give you relay protection and hands-free access without the subscription.”
Full feature comparison
Every feature across all three products, side by side. Use this to confirm the specific capabilities that matter for your situation.
Feature
IC3ST
IS357
ONE+
Physical relay — engine circuit cut
✓
✓
✓
Zero ECU / CAN bus contact
✓
✓
✓
Standalone (no MCU required)
✓
✓
✓
Wi-Fi app control
✓
✓
✓
Proximity TAG fob (hands-free)
✓
✓
✓
Motion detection alert
✓
✓
✓
Anti-hijack
✓
✓
✓
Valet mode
✓
✓
✓
12/24V compatible (EV, HGV, van)
✓
✓
✓
Proximity range
1.5m
5m
5m
Bluetooth module
—
✓
✓
Smartwatch / smart ring support
—
✓
✓
4G remote access
—
—
✓
Live camera feed
—
—
✓
GPS+GLONASS tracking
—
—
✓
Automatic night immobilisation
—
—
✓
Face ID driver recognition
—
—
✓
Cloud storage (subscription)
—
—
✓
Microphone + speaker
—
—
✓
Product price
£139
£149
£199
Fitted price (from)
£300
£320
£380
Six real scenarios — matched to a product
The right product depends on your situation as much as the specs. Here are six real buyer profiles and the product that fits each one best.
Daily driver, mid-range car, want solid protection without overcomplicating it
You drive a VW Golf, Ford Focus, or similar. The car is worth £18,000. You want peace of mind that relay attacks won’t work. You don’t need GPS or live camera — you just want the engine to not start for someone who doesn’t have your tag.
IC3ST — £139BMW 5 Series owner, parked on a residential street, warranty still active
Your car is on the most-stolen list. Your manufacturer has flagged that CAN bus devices can affect warranty. You want relay-based protection that disarms before you reach the door — and that works with your Apple Watch.
IS357 — £149Range Rover parked outside overnight in a high-theft postcode
You live in London, Birmingham, or Manchester. Your Range Rover is parked on the street. You want it to lock down automatically at midnight without any action from you — and to be able to see it and immobilise it remotely if something happens at 3am.
ONE Plus — £199Ford Transit with £8,000 of tools inside, your livelihood depends on it
You’re a tradesperson. The van is your office. Tools inside are worth more than the van. You park on the road overnight in a mixed area. You want the engine immobilised and motion alerts if someone opens the doors.
IC3ST — £139Leave your car at an airport car park for a week at a time
You travel frequently for work. Your car sits in a public car park — sometimes for 5–7 days. You want to check on it, know it’s still there, and be able to immobilise it remotely if you get an alert.
ONE Plus — £199Porsche Cayenne owner who wears a smart ring and wants zero friction
You want the car disarmed when you’re within 5 metres. You wear an Oura ring or similar. You don’t want to carry a fob or unlock an app — just walk up and get in. The car should arm itself automatically when you walk away.
IS357 — £149The decision tool — answer three questions
If you’re still undecided, use this. Find your row and the recommendation follows.
Your priorities
Best fit
I want solid relay protection and hands-free access. I don’t need GPS, remote camera, or 4G. Budget matters.
IC3ST
I want the car disarmed before I reach it (5m), and I want to use my smartwatch as the trust device.
IS357
I drive a BMW, Range Rover, or Mercedes. The car is on the most-stolen list and is under manufacturer warranty.
IS357
I want the car to lock itself down automatically at night without me doing anything.
ONE Plus
I want to see a live camera feed of my car from my phone at any time.
ONE Plus
I want GPS tracking so I can locate the car if it’s stolen and act before it disappears.
ONE Plus
My car parks in public places or a high-theft area overnight regularly.
ONE Plus
I run a fleet of vans or need driver monitoring and accountability.
ONE Plus
I drive a van or HGV. I want relay protection compatible with 24V systems.
IC3ST
I drive an EV or hybrid and need to protect the auxiliary circuit without touching the drivetrain network.
IC3ST
I’m not sure — I want someone to tell me what fits my specific car.
WhatsApp us
All three products are relay-based — zero ECU contact, zero CAN bus interference, zero warranty risk from the installation method. The choice between them is entirely about features and range, not about the quality of the fundamental protection. Any of the three stops a relay attack dead.
“I’m not a salesman. I’m an engineer. I’ll tell you the right product for your car — and if the IC3ST is enough, that’s what I’ll say. I built all three and I install all three. I know exactly what fits what.” — Victor, Founder of LockCar
The bottom line
The IC3ST covers the majority of individual car owners — relay protection, hands-free proximity disarming, full app control, professionally fitted. If that’s all you need, it’s all you should pay for.
The IS357 is worth the additional £10 if you drive a premium vehicle on the most-stolen list, if you want the longer proximity range, or if you want your wearable to be the trust device. It costs almost nothing more and removes the only practical difference between walking up to your car and it just working.
The ONE Plus is a different proposition — it’s for the owner who wants to sleep soundly knowing the car locked itself down at midnight, who wants to be able to see it and act if something happens while they’re away, and who wants GPS as a last line of defence if it does get taken. It’s priced at £199. Fleet-grade systems that do the same thing start at £1,500. The difference is that Victor builds it himself.
Still not sure? WhatsApp Victor directly with your make, model, and where you park overnight. He’ll give you a straight answer in plain English — no sales script, no upsell, no call centre. The engineer who built all three products, telling you which one fits yours.