01
Visual inspection
Pass · Fail · N/A
First, as the Code of Practice has it. Damaged flex, cracked casing, the wrong fuse, a plug that has been got at.
ClearStack Apps
FROM £1.99 Get PATBook
PAT TESTING LOG & CERT
PATBook
PAT Testing Log & Cert
The tester is in your hand. The paperwork should be too.
PATBook is where the readings land. Type the earth continuity and the insulation resistance straight off your instrument at the socket, record your own PASS or FAIL, and the certificate and asset register come out of the phone at the end of the job. No laptop back at the office, no account, no signal needed.
14-day full trial, no card.
£1.99/mo · £9.99/yr · £24.99 once.
Two numbers, and the call you make about them
A portable appliance test comes down to a visual inspection and a couple of meter readings. PATBook lays the form out in that order and prints the Code of Practice guidance figure directly under the fields that take a number, so you are not checking it against a laminated card on the van dashboard.
02
Earth continuity
0.04 Ω
Guidance shown in the app: ≤ 0.1 Ω + lead resistance (R)
Asked for on Class I only. Class II and Class III appliances never see the field.
03
Insulation resistance
4.2 MΩ
Guidance shown in the app: ≥ 1 MΩ, and ≥ 2 MΩ on Class II
The figure moves with the class, and with heating or cooking loads over 3 kW. The app swaps the line for you.
04
Polarity and function
Pass · Fail · N/A
Lead polarity, then the switch-on check, with an optional load or leakage reading in milliamps if you take one.
05
Overall result
PASS / FAIL
You enter it. PATBook stores it against the appliance and carries it onto the certificate. It never works the result out from the readings, and it is not trying to.
Each test also keeps the appliance class as it stood at the time, the retest interval you chose, the next due date, your name, notes, photos, and a free-text field for the instrument you used.
Whatever tester is in the bag
PATBook has no cable, no Bluetooth pairing and no download step. That is a deliberate limitation, and it is why it works: a twenty-year-old meter, a borrowed one, a hire unit from the wholesaler and next year's replacement all produce the same record, because you are the one reading the display.
It also means the record outlives the instrument. Type the make, model or serial into the test and it appears on the certificate as the instrument used, which is the part an auditor asks about long after the meter has been sold on.
- No pairing, no proprietary file format, no vendor software
- Asset IDs typed, or scanned off a QR or barcode label
- Instrument recorded per test, not per phone
- Nothing to install on a PC, and nothing to license
A site produces two documents
Both are built on the phone and shared straight from it. Neither is a template you fill in afterwards; they are rendered from the tests you logged that day.
Portable Appliance Test Certificate
One row per appliance, carrying its latest test.
- Header
- Site, client, address, date of test, tester, company, competency, test instrument
- Summary
- Tested, passed and failed counts
- Columns
- Asset ID · Description · Class · Visual · Earth Ω · Insul. MΩ · Polarity · Function · Result · Next due
- Foot
- Your captured signature, name, company and competency, and page numbers
Failed rows are tinted so they are not missed on a printout.
What a PAT test certificate has to carryPDF + CSV
PAT Asset Register
The full inventory for the site, sorted by what falls due first.
- Header
- Site, client, address, appliance count, tester
- Columns
- Asset ID · Description · Make / model · Class · Location · Last tested · Next due · Result
- Marked
- Overdue rows tinted, and anything out of service labelled and left undated
- Also CSV
- The same register as a spreadsheet, so the data is never stuck in here
On the standard tier both PDFs carry a small “made with PATBook” watermark.
The app itself
Captures from the shipped build, filled with sample records.
Scroll sideways, or use the arrow keys
Retest intervals you set, not a fixed table
The fifth edition of the Code of Practice dropped the old fixed-frequency table in favour of risk-based intervals. PATBook ships five starting points, and every one of them is a suggestion you change. Pick one on a test and it sets the next due date; edit that date directly when the risk assessment says otherwise.
- 3 mo Construction 110V
- 6 mo Class I handheld
- 12 mo Class II handheld
- 24 mo Office / IT
- 48 mo Stationary / low-risk
Anything inside thirty days shows as due soon, anything past its date as overdue, both on the overview and on a Retests screen that pulls from every site at once. Turn on retest reminders in Settings and the phone tells you before the customer does.
How PAT testing intervals are decidedWhat it does not do
PATBook is a record-keeping and certificate-preparation tool. It does not test anything, it does not judge anything, and it cannot make an appliance safe. That work is yours, under the current IET Code of Practice and your own risk assessment.
The same wording sits under every test you record, on the cover of every PDF, in Settings and during onboarding:
PATBook helps you record portable-appliance test results and prepare a certificate and asset register. It is not a substitute for competent inspection and testing, and it does not determine, compute, or guarantee whether any appliance is safe. PASS/FAIL is your professional judgement based on your own visual inspection and instrument readings. Test methods, pass limits, and retest intervals must follow the current IET Code of Practice and your own risk assessment. You are responsible for the accuracy and sufficiency of every record and certificate you produce.
Background reading and the relevant guidance are collected on the PATBook resources page.
What it costs
STANDARD TIER
Free
Install it and everything works for fourteen days with no card. After that the standard tier keeps going, with limits.
- One site and up to fifteen appliances
- Full test records, certificate and register
- Certificates carry a small watermark
- Shows a banner ad
Records you have already made are never hidden, locked or deleted, and you can still export them. The cap only stops new ones.
FULL
£24.99once
or £1.99 a month, or £9.99 a year
Removes every limit. The one-off price does not renew, and updates are included.
- Unlimited sites and appliances
- Certificates without the watermark
- Removes the ads
Retest reminders, backup, restore and privacy mode are not behind this. They work on every tier.
Get PATBookQuestions
Does PATBook connect to my PAT tester?
No, and that is the point. You read earth continuity and insulation resistance off whatever instrument you already use and type them in, so no brand is locked out. Each test has a free-text field for the tester make, model or serial.
Does the app decide whether an appliance passes?
No. It prints the IET Code of Practice guidance figure under the earth and insulation fields and records the PASS or FAIL you enter. The determination stays yours.
What is actually in the certificate?
A header with site, client, address, date of test, tester, company, competency and the instrument used, then one row per appliance carrying class, visual, earth continuity, insulation resistance, polarity, function, result and next due date, then your signature.
Does it work with no signal?
Yes. Sites, appliances, tests, photos and both PDFs are produced on the phone. There is no account, no sign-up and no server holding your records.
What happens when the trial ends?
Nothing you have recorded is hidden or deleted. Everything stays readable and can still be exported. The standard tier holds one site and fifteen appliances, shows ads, and watermarks certificates; adding beyond that needs a plan.
Is it a subscription?
Your choice. £1.99 a month, £9.99 a year, or £24.99 once. The one-off price does not renew.
Start with the next site
Add the site, add the first few appliances, and log a test the way you would write it on the sheet. The certificate is one tap from there.