Independent app studio
Small apps.
No strings.
Crimvex makes focused tools for your phone: Docuvex for documents, Qrvex for QR codes and Spendvex for receipts and expenses. Free to use, with no accounts, no ads, and nothing collected.
Our first app
Docuvex
Scan, sign and share PDFs — free, no watermark, no account, no subscription.
Scan
Edges found and straightened. Many pages in one PDF.
Sign
Draw your signature once, place it on any page.
Merge & split
Combine documents, extract pages, drag to reorder.
Recognise text
Copy or search the words in your scans.
Compress
Shrink PDFs to email-friendly sizes.
Private
No account, no ads, no tracking. Fully offline.
Scan. Sign. Share. All free.
Crisp, searchable PDFs
Sign in seconds
Every tool, free
Stays on your phone
Also by Crimvex
Qrvex
Scan and create QR codes — free, with a safe link check, no ads and no account.
Scan anything
Camera or photo. Links, Wi-Fi, contacts, email and more.
Safe links
See the real website and get warnings before you open it.
Create codes
Eight types, your colours and logo, saved in high resolution.
Wi-Fi in a tap
See the network and copy the password.
History
Search, star and reopen every code you scan or make.
Private
No account, no ads, no tracking. Stays on your phone.
Scan safely. All free.
Make your own codes
Join Wi-Fi in a tap
Everything in one place
Stays on your phone
New
Spendvex
Scan receipts, track spending and export for tax time. No account, no cloud, no ads.
Reads receipts
Shop, date, total and VAT filled in for you, on your phone.
Every expense
Monthly totals, search and 12 categories.
Reports
See where your money goes, by month or tax year.
Your tax year
March in South Africa, April in the UK, or any month you choose.
Export
A spreadsheet plus every receipt photo, in one zip.
Private
No account, no cloud, no tracking. Back up to a file you keep.
Scan a receipt. Skip the typing.
Every expense in one place
Ready for tax time
Receipts kept safe
Stays on your phone
Principles
The apps we wish existed.
Free means free
No paywalls, no watermarks, no “premium” tier holding back the feature you came for.
Private by design
No accounts, no analytics, no ads. Our apps collect nothing, so there is nothing to leak or sell.
Works offline
Your files stay on your phone and the work happens there too. No upload, no waiting on a server.
Plain language
Policies you can read in two minutes, and an inbox a real person answers.
Say hello.
Questions, bug reports or an idea for the next app. A real person reads every message.
crimvex001@gmail.com