About

A software studio with a point of view.

Cobalt inFX builds intelligent, privacy-first software for people who want precision and control — tools that do serious reasoning on your own device, and never ask you to trade your data for the privilege.

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The thinking

The longer argument for why the apps are private, cautious, and built to help you decide.

Read the essay →
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Writing

Essays on data quality, governance, and decision-making in the age of AI — the ideas underneath the apps.

Browse the writing →

We are a small studio by design. Small enough to answer to no one but the people who use what we make; deliberate enough to hold every product to a single standard — does this genuinely help someone decide, and can they trust it completely? If the answer to either half is no, it doesn't ship.

That standard is not a slogan. It comes from years spent building the kind of data systems that organisations bet real money on — where a number that couldn't be trusted was worse than no number at all. We build consumer software to that same bar, and see no reason a person should expect less rigour than a boardroom does.

What we're really doing is moving good judgement closer to you.

The intelligence that used to live inside large, private systems — the reasoning that turns messy inputs into a decision you can act on — no longer needs a data centre or a login. It can run on the device already in your hand. Cobalt inFX exists to put that capability where it belongs: with the individual, working privately, entirely under their own control.

What we build for

  • Reasoning that earns its answer, not features that fill a list
  • Everything processed on your own device, by default
  • Candour about uncertainty — estimates and unknowns shown as they are
  • Decisions handed to you, ready to act on
  • Precision and control, kept firmly in your hands

What we won't do

  • Collect, sell, or quietly upload your data
  • Treat your attention as something to capture
  • Dress up a guess as a confident answer
  • Lock the essentials behind a paywall
  • Track you, anywhere, for any reason
Discipline
Privacy-first, on-device software — intelligent tools that stay yours
Products
Vox Dictum for macOS · ChargeSort for iPhone
Based in
London, United Kingdom · built for a global audience
The founder
M. Ozair Rasheed, founder of Cobalt inFX

M. Ozair Rasheed

Founder, Cobalt inFX

Cobalt inFX was founded by M. Ozair Rasheed, a data and AI transformation leader with more than two decades delivering large-scale technology programmes across the UK, Europe, the Middle East and South Asia — building systems that learn from data, anticipate what comes next, and turn it into decisions people can act on, in settings where a wrong answer carried real financial and operational consequences.

That background is the reason the apps are built the way they are: decision-first, candid about uncertainty, and private by default. The conviction that people should keep control of the systems they rely on didn't come from a mission statement — it came from watching what happens when they don't.

He also writes on data quality, governance, and decision-making in the age of AI.

View full profile on LinkedIn →

The apps are the proof of all this — but if you want the reasoning behind them, read the thinking or browse the writing.

Explore the apps Get in touch

Product

Vox Dictum

Private, on-device transcription for macOS. Import any recording, label speakers, and generate intelligent summaries — all processed locally on your Mac.

🔒
100% on-device
⚡
Apple Silicon
🌍
Transcription in 60+ languages
Vox Dictum

Download on the Mac App Store

macOS 14.6+ · Apple Silicon (M1 or later)

🎙️

AI Transcription

Import audio or video. AI-powered speech recognition transcribes with high accuracy across 60+ languages. AI summaries available in English and major languages.

👥

Speaker Recognition

Automatically detect and label speakers. Rename a speaker once — all phrases in that file update. With Pro+, the same voice is recognised across multiple recordings.

📝

AI Powered Summary

Generate structured summaries tailored to meetings, interviews, podcasts, and more — with key decisions, action items, and speaker contributions. On-device AI — no cloud, no data sharing.

🔇

Audio Enhancement

Built-in speech enhancement, background noise removal, and silence removal. Better input, better output.

📤

Flexible Export

Export as TXT, Markdown, HTML, or SRT subtitles — all with speaker names. Ready for your workflow.

🛡️

Complete Privacy

Zero data collection. Zero analytics. Zero cloud processing. Your recordings and transcripts never leave your Mac.

Vox Dictum MacWhisper Otter.ai Dragon
On-device processing ✓ ✓ ✗ ✓
Zero data collection ✓ ✓ ✗ ✗
AI Summary ✓ On-device ✗ Cloud ✗
Speaker recognition ✓ On-device ✗ Cloud ✓
Overlap detection ✓ ✗ ✗ ✗
Audio enhancement ✓ ✗ ✗ ✗
Free tier Unlimited ✗ 300 min/mo ✗
Price From £7.99/mo €59 one-time $16.99/mo $699
Start free. Upgrade when you need more.
Free
£0
No credit card required
  • Unlimited transcriptions
  • Small and Base transcription models
  • Speaker diarisation and renaming
  • Transcription in 60+ languages
  • Audio enhancement suite
  • Export as TXT, MD, HTML, SRT
  • Audio Advisor
  • URL and podcast import
Popular
Pro
£7.99 /month
Everything in Free, plus:
  • Advanced transcription models
  • AI Powered Summary
  • Overlap resolution
  • Custom vocabulary corrections
  • Speaker reallocation
  • Transcript phrase splitting
  • Bulk transcript export
Pro+
£12.99 /month
Everything in Pro, plus:
  • Speaker recognition (voice matching)
  • Consistent labels across batch jobs
  • Auto-label propagation
  • Project-level speaker re-run
Annual: £99.99/year — save 36%

Product

ChargeSort

Public charging, ranked by what a charge will actually cost you — and how long you will actually be there. Built for UK EV drivers.

No network pays to rank higher — the order you see is only ever about what's cheapest for you, never who paid.

🔌
Nine UK networks
🚗
Priced for your car
ChargeSort

Download on the App Store

iPhone · iOS 18 or later

💷

The energy price you will pay

Headline pence-per-kWh is rarely the whole story. ChargeSort works out the cost of the charge you need — your car, your connector, your current battery level — including connection and overstay fees where operators charge them.

⏱️

How long you will really be there

A 150 kW charger does not give every car 150 kW. Time is estimated from your car's own charging curve and the battery level you are starting from, so a cheap charger that takes an hour longer does not look like a bargain.

🗺️

Availability

See which bays are free, in use, or out of service — every reading carries the time it was last seen. We refresh status roughly every 12 minutes, so we show you the age of the data rather than calling it live.

🏠

Home is a charging option too

Enter your home tariff and ChargeSort compares public charging against charging at home — including the cheap overnight window on a time-of-use tariff, or a single flat rate if you use a communal or workplace charger.

💳

Is a membership worth it?

Subscriptions and memberships pay off at some mileages and not others. ChargeSort shows the break-even maths for how you actually charge, per operator, and leaves the decision to you.

🎯

It says when it does not know

Where an operator does not publish a rate, ChargeSort shows the price as unknown rather than guessing. Estimated figures are labelled as estimates. Nothing is dressed up as more certain than it is.

🧭

Plan a journey, not just a stop

Set a destination and ChargeSort works out where to charge along the way, matched to your car and the range you want to keep — free for everyone. With Plus it picks those stops for cost-effective charging across all networks, applying any memberships you hold.

📈

See what you spent — and saved

Charge at a recommendation, confirm it, and ChargeSort keeps a running history of your spend and the savings against the pricier options — all on your phone, never uploaded.

🔍

Filter the map to what you can use

Browse chargers on the map, filtered by operator and power and priced for your car. Zoom out and the counts still match your filters; on Plus you choose whether pins show the cheapest, fastest or balanced price.

Start free. Go Plus when it pays off.
Free
£0
No account required
  • Your best charging option, ranked by cost for your car — plus one alternative
  • Cheapest, Fastest & Balanced options
  • Map with status refreshed to the last few minutes
  • Plan a journey with charging stops matched to your car and range
  • See when charging at home is cheaper
  • No ads
  • Your details are never paywalled
First month free
Plus
£2.99 /month
Everything in Free, plus:
  • Your member & app rates — the true price with your memberships, not just walk-up
  • See how your rate is built (walk-up → app → member)
  • The full ranked list of chargers near you
  • Journey cost — priced legs and detour costs across your route
  • A price-coloured map with car-aware detail
  • A DC charging-curve chart for your car
  • Reminders for your cheapest charging window
  • Your memberships on Home — which you hold and whether each pays off
  • Is a membership worth it? — per-operator break-even maths
Annual: £24.99/year — first month free
Your car, your home tariff and your charging history are never paywalled.

Support
Need help?

Before contacting us

Both apps have Help built in — Vox Dictum: Settings → Help. ChargeSort: Settings → Help & About. Most common questions are answered there.

Common topics

Model downloads require a stable internet connection (~2–7 GB depending on features used). Transcription with advanced models may take longer than the recording duration — this is normal for on-device processing.

Vox Dictum system requirements

macOS 14.6 (Sonoma) or later
Chip Apple Silicon (M1 or later)
RAM 8 GB minimum, 16 GB recommended
Storage ~4–7 GB for AI models (downloaded on first use)

ChargeSort system requirements

iOS 18 or later
Device iPhone
Coverage United Kingdom
Account None required

ChargeSort — common questions

Availability comes from operator feeds refreshed periodically, not from a live stream, so every reading shows when it was last seen. Where a price shows as unknown, the operator does not publish a rate for that connector — the app will not guess one.

Send us a message

Click the button below to open your email client. Describe your issue and attach screenshots if relevant.

Please include:

  • › What you did
  • › What you expected
  • › What happened
  • › Screenshots (attach as .jpg or .png)

support@cobaltinfx.com