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10 AI use cases ready to integrate into your app.

Without blowing up your API bill.

Most agencies sell you a ChatGPT wrapper parked in a corner of the app. It impresses in a demo, nobody uses it after three weeks, and it gets removed at the next update.

This page lists ten use cases that hold up in production: what they return, what they cost to build, what they cost to run, and the technical misstep that sinks them. The fourth field is the most useful — it's the one you only write after shipping them.

⚠️ The costs shown are orders of magnitude per unit of usage, excluding development, at August 2026 rates. They settle one question: no, running these features is not expensive. What costs money is building them badly.

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01

Voice agent

It answers, qualifies, books the meeting or escalates. Around the clock, several calls at once.

What it returns

A missed call goes to a competitor. A human handles one call at a time, the agent takes several — the only use case here that recovers revenue rather than saving time.

Complexity

High

Running cost

~€0.02 to €0.08 per call

The misstep to avoid

Latency kills it. Past a second of silence the caller hangs up or talks over. You must stream the answer and handle barge-in — not wait for the full sentence before speaking it.

02

Media post-production

Transcription, subtitles, clipping, formatting for publication. What an editor does, at volume.

What it returns

Dozens of hours a month out of the schedule. A freelance editor costs €380 a day; here the same output fits in a two-figure API bill.

Complexity

Medium

Running cost

~€0.01 per minute of audio

The misstep to avoid

Never route the video through the phone. Upload to the server, process there, notify when ready. A job started from the app dies the moment the screen locks.

03

Content engine

Articles, product sheets, document summaries, rewrites. Structured, not filler by the yard.

What it returns

A decent product sheet for each of your ten thousand references, instead of three hundred written by hand and seven thousand left empty.

Complexity

Low

Running cost

~€0.003 per generation

The misstep to avoid

Demand structured output, never free text to parse afterwards. The day the model adds a polite sentence before its answer, parsing breaks silently and you publish the sentence.

04

Business assistant on your data

An assistant that answers from your documents, your catalogue and your procedures — not from the internet.

What it returns

Repetitive support questions stop reaching a human. And the internal team stops digging through eighty pages of procedure.

Complexity

Medium

Running cost

~€0.002 per question

The misstep to avoid

Without automated evals you will never know it started making things up. You need a suite of trap questions replayed on every model or prompt change — that's what separates an assistant from a time bomb.

05

Adaptive onboarding

Three questions on arrival, and the app tunes itself: screens, wording, the first action offered.

What it returns

The cheapest retention lever here. The first two minutes decide, and that's where half of installs are lost.

Complexity

Low

Running cost

negligible — rules are often enough

The misstep to avoid

Don't call a model for this. A rules tree does the same job, instantly and offline. Putting AI here adds latency and a bill to an already-solved problem.

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06

Voice that fills the form

The user speaks, the fields fill in. A site report, an order, a customer record dictated while walking.

What it returns

The use case that unlocks field work. A twelve-field form thumb-typed on a site never gets filled; dictated, it takes twenty seconds.

Complexity

Medium

Running cost

~€0.004 per dictation

The misstep to avoid

Always show the filled form before submitting, and make it editable. Transcription gets numbers and proper nouns wrong — exactly what matters in a business form.

07

Document reading

Receipts, invoices, purchase orders, ID papers: photographed, read, filed into the right fields.

What it returns

Manual entry disappears. The easiest use case to quantify in front of an owner: how many documents a month, how many minutes each.

Complexity

Medium

Running cost

~€0.002 per page

The misstep to avoid

Handle the bad photo before anything else. Backlight, folded paper, half the receipt out of frame: if the app can't say "retake it", the user assumes it worked and finds out at accounting time.

08

Search that understands

Find by meaning and context, not exact words. "The waterproof jacket for the mountains" returns the right item even if none of those words is in its description.

What it returns

An internal search that returns nothing is a lost sale and a user who won't try again. On a catalogue it shows up directly in conversion.

Complexity

Low

Running cost

~€0.0001 per search

The misstep to avoid

Keep classic search alongside. On an exact reference or a serial number, meaning-based search is worse — you need both, and take the better of the two.

09

The summary that saves the hour

A forty-page report, an hour-long meeting, a three-day thread: a one-minute note.

What it returns

The time recovered is management hours, not execution hours. That's what makes this one easy to sell internally.

Complexity

Low

Running cost

~€0.006 per document

The misstep to avoid

Always link back to the source from the summary. A note you can't verify won't be used to decide — and a summary that doesn't inform a decision is useless.

10

Re-engagement that isn't generic

Notifications written from what the person actually did in the app, not one message blasted to everyone.

What it returns

Thirty-day retention decides whether an app lives or dies. A generic nudge gets muted; a well-aimed one brings people back.

Complexity

Low

Running cost

~€0.0005 per send

The misstep to avoid

Never let a model send directly. Generate, cap the frequency, keep a banned-phrasing list, and watch opt-outs. One bad notification costs you permission to send any more — and that doesn't come back.

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The ten use cases, condensed into one sheet you can forward to your co-founder or your tech team. One email, nothing else.

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