15 hours of night shifts, 41.80 euros take-home: a Finnish app that "checks your payslip for you" hit #12 on Top Grossing, then dropped

A Helsinki company registered only half a year earlier turned more than a dozen Finnish collective agreements into calculation rules and built a €2.99/month app: shift workers enter their shifts, it tells them what they should have earned this month, and then checks it against the payslip line by line. Within 18 days of launch it hit #12 in the Finnish App Store finance Top Grossing chart, and a week later it had dropped to #47. This piece covers why the idea works, which parts of the approach are worth copying, why it still can't be called a success, and whether copying it in another country is worth it.

A 41.80-euro payslip

In April 2023, the Finnish public broadcaster Yle's investigative programme MOT reported on a nurse who worked 15 hours over a weekend. Deductions kept piling up on her payslip, and she ended up with 41.80 euros take-home, without understanding why. The same year Yle reported that the City of Helsinki's payroll system had about 6,500 unfixed errors, and 5,300 of those underpaid people for seniority, experience, or job allowances. The service-sector union PAM's annual report says its union officers handle about 650 pay disputes a year and recover about €2.5M.

Those numbers now sit one after another on the homepage of shifta.fi, under a single headline:

Palkkalaskelma ei kerro, mitä sinun olisi pitänyt saada. Se kertoo, mitä sinulle maksettiin. (A payslip won't tell you what you should have gotten. It only tells you what you were paid.)

That is what Shifta sells.

What it is

Shift pay in Finland is not "hourly rate × hours." Evening, night, Saturday, Sunday, public holiday, and eve-of-holiday shifts each carry their own allowances. In periodic work arrangements (jaksotyö), such as hospitals and airports, overtime is only calculated at the end of a three-week cycle. Every industry's collective agreement (TES in Finnish) has different rules, and some even list a separate rule for "retail stores after 18 p.m." An ordinary employee almost never can work it all out themselves.

Shifta's flow has three steps: pick your TES; enter each shift's start and end times in the calendar; on payday, check the payslip against its calculation. Every euro can be expanded to show how it was calculated, for example "evening allowance 4 hours × 2.70 euros." From 10-30 onward you can also photograph a payslip, and it recognizes and compares automatically.

Industries covered: retail, restaurants and hotels, security, aviation (Finnair cabin crew, Finavia, Airpro), port loading, logistics and warehousing, municipal and public healthcare (KVTES, SOTE), and private care and early childhood education. There are 16 TES guides in total. It especially stresses that it is not connected to the employer's systems, so the employer cannot see your data.

Pricing is €2.99/month or €19.99/year, with a 14-day trial that requires no card (shifta.fi, 11-06). The company is Shifta Solutions Oy, founded in Helsinki on Mar 2026 31 (per the Finnish business register), and it has built only this one app. The founders have not made public appearances.

Top Grossing #12, what is it worth

Look at the numbers first:

App Store Finland, daily chart. Over the same period, Google Play installs reached 10+, and the Facebook page had 24 followers (11-06).

"Reached the top 20 in finance Top Grossing three weeks after launch" sounds impressive, but Finland's iOS user base is small, and the front of the finance category is dominated by global apps like Kraken, Splitwise, YNAB, and Seeking Alpha, plus a pile of AI stock-signal apps, with very few local products. On this chart, a few dozen annual subscriptions are probably enough to reach the top 20 (estimate; Apple doesn't disclose revenue).

The timing fits: the app launched on 10-13, the trial lasted 14 days, and from 10-27 the first trials began converting to paid, and the ranking peaked at #10-31. Afterward no new paid volume came in to take over, and it dropped 35 places in a week. In 7 days it gained only 1 ratings.

So the more accurate summary is: some of the first trial users did pay, which shows people will pay for this; but no sustained growth has been seen yet.

Where users came from: writing articles a month before launch

The most interesting part of Shifta isn't the app, it's the website.

• SEO first. shifta.fi has about 60 articles, 16 industry TES guides, and about 40 online calculators, all targeting long-tail queries like "how Sunday allowances are calculated," "Saturday allowance in retail," and "how to check a payslip." The earliest one (Saturday allowance in retail) was published in Sep 9, more than a month before the app launched. Searching for "shift allowance calculator app" in Finnish now turns up its calculator page.
• Free calculators can be embedded on other sites. There is a page on "embedding the pay calculator on your site": copy a snippet, paste it into WordPress, and a line under the calculator links back to Shifta, which updates automatically when an agreement changes. It is aimed at union branches, industry blogs, and job sites, effectively getting others to supply backlinks for it.
• Posting in Facebook groups. 11-01 posted in the Turku local community group "puskaradio turku," and posts tagged #shifta appear in a Lapland nurse recruitment group and a house-flipping group.
• A small Meta ad run. The Meta Ad Library shows about 5 ads in Finland, with the copy "Palkkapäivä ilman yllätyksiä. Vuorotyöläisen oma palkkatarkistin" (payday with no surprises, a pay checker for shift workers). All had stopped running by the time of 11-06. How long they ran and how much was spent isn't visible.
• Referral program. Invitees get the trial extended from 14 to 30 days, and each referrer gets 30 free days for every paying user they bring in.
• What's missing: no media coverage, no union endorsement, no influencer promotion, and no mention on X in 60 days.

Its real barrier: reading the agreements one by one

Shifta's changelog has a new entry almost every day. From 10-11 to 11-06 there are some forty entries, most of them fixing rules: "When a public holiday falls on a Saturday, the Sunday allowance for evening shifts was counted twice; now it counts once," "the early-shift allowance before 6 a.m. for logistics supervisors had been missing, now added at 20%," "the wage calculations for 15 retail grades have each been checked."

This is both its moat and its burden. Generic timesheet apps (HoursKit, Earner, and the UK's Nursie) just multiply hourly rate by hours and don't understand Finnish agreements. Union websites have PDF and Excel calculators that are authoritative and free, but they only handle single items, not a full month based on your rota, and they don't reconcile against a payslip. Employer-side payroll apps (Simo, SD Worx eLiksa) only display information and don't check it. The position of "employees calculate precisely under the agreement and reconcile against the payslip" has been mostly empty in Finland until now.

But it isn't the only one to have thought of this. 10-20, one week after Shifta, another Finnish app, "Vuoroplus," launched: it covers only shift allowances in healthcare, is completely free, needs no login, and stores data only on the phone (iOS 3 ratings, Play 10+). The two launched a week apart, which looks more like independent thinking than copying. It shows the idea itself is not hard to come up with; what's hard is getting the rules right, complete, and up to date with each agreement.

Copying it in another country: is there room?

Strong collective agreements, small languages, and frequently miscalculated wages: these conditions hold in the Nordics, the Netherlands, and Germany alike. 11-06 searched around and found that neighboring countries already have people trying, all small:

The demand is as real as in Finland: the Swedish white-collar union Handels and the municipal union Kommunal both explain on their websites how members should read payslips. The supply is also similar to Finland: either a union explainer page or a very small free app.

still unclear

• how many people actually pay. Reverse-engineering from the rank is inference only. How many of those days hitting #12 were founder and friend test subscriptions, we don't know.
• whether it holds a spot after paid ads stop, or slides off the chart.
• whether the union itself ships a free app, or whether Vuoroplus expands to more sectors. If either happens, €2.99 is hard to defend.
• how many shift workers in a small-language country will pay monthly. Finnish nurses, retail and hospitality add up to hundreds of thousands of people, but nobody has published a conversion rate.

If it were you

B: worth a try. The idea is right and the playbook is clear, but it hasn't yet proven it can take off, and every country means re-reading its agreements.

Shifta proved two things: people will pay for "check my payslip for me," and laying SEO groundwork before launch can bring in the first users. What it hasn't proven is that paying users keep growing. Anyone following it is betting on that.

Who it suits: developers living in Sweden, Norway, Denmark, the Netherlands, Germany (or any country with complex collective-agreement pay and a small language), whose native language is the local one; ideally someone who has worked shifts, or whose family has, and can read agreement clauses; and who is willing to spend months going through agreements line by line and updating the rules as each year's negotiations land.

Who it doesn't suit: anyone who only wants the English market (the US and UK have no collective agreements this complicated, and generic timesheet apps are enough); anyone trying to cover every sector and every country at once (one wrong rule becomes a trust incident); anyone expecting revenue within a month.

How to do it: pick the sector with the most workers, the most complicated allowances, and the most frequent media-reported errors in one country (in Finland, nursing and retail), and cover only that agreement, so every euro can be traced back to its source. Three core features: a calendar for entering shifts, a full-month estimate, and reconciliation against the payslip (photo recognition can come later). Price like Shifta: around €2-3 monthly, about €20 yearly, free trial without a card; emphasize "your employer can't see it."

How to get users: follow Shifta's sequence, starting a month before launch: one guide per agreement, one free online calculator per allowance, and one article for each "how is X allowance calculated." Build a calculator that can be embedded on other sites, and pitch it to union branches, industry forums and job sites. On the homepage, show real cases of underpaid wages reported by local media and unions, one number per case. Then post in local Facebook groups and nursing and retail staff groups. Once you have the first paying users, test with a small Meta ad budget. Don't buy traffic from day one.

What window: there's no obvious time window, but ideally launch before local unions or similar free apps build out employee-side reconciliation. Sweden's Passkoll already does this, just without many users; if you're in Sweden, launch within six months.

What would show you're wrong: ① Shifta drops out of the top 100 of Finland's Finance Top Paid chart before 2027 January, with ratings still in single digits, showing the first payers were just friends and early adopters and won't stick; ② a major Finnish or Nordic union launches a free equivalent app; ③ a free product like Vuoroplus expands into retail and hospitality, forcing Shifta to cut prices or go free; ④ the reverse: if Shifta holds a spot in the top 50 after ads stop and ratings climb into the dozens, that means SEO is bringing sustained payments, and you should move fast.

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Data and sources: App Store Finland Finance Top Paid chart and rating counts (10-31 to 11-06); Shifta website homepage, TES guides, calculators, embeddable calculator page, changelog, referral terms (11-06); Finnish business register (Y-tunnus 3613258-2); Google Play store page; Facebook page and group posts; Meta Ad Library Finland (11-06); Yle MOT (2023-04), Yle (2023), SuPer and PAM 2023 annual reports; Vuoroplus website and store page; App Store pages for Sweden's Passkoll and Denmark's Vagter (11-06); Hotellrevyn (2018). Places marked "inference," "estimate" or "unverified" are inferences or unverified.