Sesin IT builds native apps for iPhone and iPad. They keep your data where you put it and ask for nothing they do not need. Most run entirely on the device; the ones that need a server — like a crew sharing one inventory — say so plainly.
Three decisions we made once and have not gone back on. They shape every app we build.
When an app can work on its own, your data stays on your iPhone and syncs through your own private iCloud, somewhere we cannot reach. When it genuinely cannot — a crew sharing one inventory — the server is ours, and the app’s privacy policy says exactly what it keeps and which services help it.
There is no advertising, no analytics SDK and no third party watching what you tap. Most of our apps do not even ask you to sign up; the ones built for a team need an account, and use it for nothing else. Nothing about you is for sale.
Written in Swift for Apple's own frameworks — not a website in a wrapper. That is what makes them fast, work offline, respect the system settings you already chose, and survive the next OS release.
Every app has its own page here, its own site, its support page and its privacy policy.
On the App Store
Routines, form and food
A complete trainer for iPhone and iPad: 21 programmes from one to twelve weeks that tell you what to do each day, and 127 exercises with their own animation you can slow to half speed to study the technique. Guidance by age from 6 to 90, including a postpartum track, plus meal plans whose calories come from your weight and activity, not a generic table.
For iPhone · iPad
On the App Store
Track your money by voice
Say what you spent and Saldy writes it down, categorised — the speech recognition runs on your iPhone, so no audio ever leaves the device. Reports that show where the money actually goes, budgets that roll over, and a forecast that names the exact date you would go into the red, before it happens. 166 currencies.
For iPhone · iPad
On the App Store
Drills, NEC tables, exam sim
Gets you through the electrical Knowledge Verification Exam by making you produce answers, not reread them. 1,188 questions, every one worked through, most carrying the NEC, OSHA, NFPA or ANSI citation behind the rule. Works entirely offline, with no account, no ads and no tracking.
For iPhone
On the App Store
Languages and maths at home
Teaches Spanish, English and French — in all six combinations — plus maths, for the whole family in one app. Spaced repetition, whole sentences instead of loose words, conjugation rather than infinitives, and pronunciation it listens to on the device. Six age modes, from a baby screen you cannot fail to an adult keyboard. No account, no servers, works fully offline.
For iPhone · iPad
On the App Store
Your secrets, sealed
Passwords, passkeys, cards, IDs and documents, encrypted on your iPhone and iPad before they are stored or backed up, so only you can open them — not even we can see your vault. No accounts, no ads, no tracking: Lacre has no server.
For iPhone · iPad
On the App Store
Material on every job site
Keeps the material of every electrical project organized — industrial, commercial and residential — so the whole crew knows what is on site and what is not. The crew logs what they take and return, the foreman approves requests and gets low-stock alerts, and it keeps working in basements with no signal.
For iPhone · iPad
Most of what we do is our own apps. The rest of the time we take on work for other people — the same way, with the same standards.
Our own product for businesses: an inbox that reads and sorts your email, answers new enquiries within limits and keeps a CRM up to date on its own.
We read everything that arrives. New project enquiries get a first reply from our assistant, and a person reviews every conversation.
