Time tracking that grew into the daily work of over a thousand Finnish companies.

The situation

In the mid-2000s Finnish small and mid-sized companies had two options for time tracking: Excel and paper, or a tens-of-thousands-of-euros SAP-class system. There was no middle ground that understood the reality of Finnish collective labour agreements (TES), local practices and company-specific rules — overtime, evening bonuses, Sunday rates, accrued annual leave and payroll exceptions — and still ran in a browser without a heavy rollout.

What we built

Kellokortti grew modularly across many years. Aacon Oy grew with it into a small team, and the product architecture, industry understanding, brand and customer insight developed in the same direction.

• Browser-based SaaS platform. The manager and payroll view — calendar, reports, approvals, annual-leave bookkeeping.
• Mobile punch-in for iOS and Android. Time entries on the phone, location information when needed and a clear view of each employee's own working hours.
• Integration with physical punch-clock devices. RFID cards and wall-mounted terminals for sites where mobile is not an option.
• Company-specific TES interpretation. A rule engine that modelled each customer's own working-time and payroll rules based on collective agreements, local agreements and practical interpretations. In marketing, this whole capability was called Palkkarobotti: complex payroll logic turned into reviewable payroll data.
• Travel and per diem. Trips, daily allowances, mileage and receipt attachments.

Brand and usability as a competitive advantage

In Kellokortti, the hard core was company-specific TES interpretation, but growth also required a clear name, a trustworthy visual identity and a user interface that managers and payroll teams could use without heavy training. Complex work had to be packaged so the buyer understood the value and the user trusted it in daily work.

That experience still shapes Tohmoco's work: a good internal tool is not just a functioning feature, but a new way of working. It has to look trustworthy, feel clear and make the business value visible.

Impact

Monthly payroll runs that used to take a bookkeeper a day or two now ran in minutes. At its peak the system served over a thousand companies — from construction to restaurants, social and health care, logistics and the public sector.

Outcome

Kellokortti joined Lemonsoft in 2020 and continues as part of Lemonsoft's time tracking and payroll family. For Aacon Oy it was over a decade of work — and the continuation still serves the same customers it was originally built for.

What this project taught

The technical side was not Kellokortti's hardest part. The hardest part was understanding the logic of collective agreements, local practices and company-specific rules so precisely that it could be turned into reliable automation. When a client today asks Tohmoco to assess a specialist system, the starting question is always the same: where is the point where technology meets law, regulation or people's daily routines?