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Source-backed analysis14

Review basis

Research-based review: the AppDuo Editorial Team compiled it from official pages, documentation, app stores, press and user feedback, without hands-on testing. Every claim links to a source with the date it was checked.

14 reference sources

Information updated Nov 11, 2026

How we review
Klarna logo

Klarna Review

Buy now, pay later in instalments, plus a card and money-management app

Editorial Team7.2/10Write the first review

By Official AppDuo editorial team · Updated

  • Web
  • iOS
  • Android
Freemium · Free
Visit Klarna
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Decide at a glance

Our verdict

Klarna suits online shoppers in supported markets who want to split payments, especially with Pay in 4 and its soft credit check. The trade-offs are late fees, Pay over time costs that are not published up front, and a recent privacy fine and investor lawsuit.

Best for: Frequent online shoppers in the US, Europe and other supported markets who want to split orders

Skip it if: People who often miss due dates: late fees and credit reporting can hurt

Pros

  • Pay in 4 uses a soft credit check and costs nothing if you pay on time
  • Pay in 4 late fees are capped: up to $7 each and 25% of order value in total
  • App Store 4.9/5 (2.5M+ ratings) and Trustpilot 4.5/5 (629k+ reviews)

Cons

  • The Pay over time page lists no APR or terms; Pay in 4 applied for in advance in the app carries a $1.29–$5.99 service fee
  • Fined SEK 7.5 million under GDPR in Sweden; faces an investor class action (allegations, no ruling)
All pros and cons · Who is it for?

More pros

  • Several ways to pay, plus the Klarna Card, cashback and a savings account

More cons

  • Data may be shared with advertising partners; 14% of Trustpilot reviews are 1-star

Best for

  • People who want payments, cashback and a card in one app

Skip it if

  • Readers in Vietnam: the sources reviewed do not show Klarna serving that market

Experience & key features

Klarna is a Swedish fintech founded in 2005 as Kreditor and renamed Klarna in 2010. Its about-us page says it is based in Stockholm and serves 120 million consumers, 1.2 million+ merchants and 26 countries. It secured a full banking licence in 2017. In the US, personal-account deposits are held at WebBank (Member FDIC), and Klarna says it is not itself an FDIC-insured bank.

Users can pay in full, Pay in 4, Pay in 30 days or Pay over time, at checkout, in the app, or with the Klarna Card, Apple Pay or Google Pay. The app also offers cashback, spending tracking, a savings account, investing, Klarna Mobile phone plans and a travel eSIM.

On cost, US Pay in 4 is free when paid on time; late fees run up to $7.00, capped at 25% of order value in total. Pay in 4 applied for in advance in the app is issued by WebBank with a $1.29–$5.99 service fee. Klarna's own example: a $248 purchase with a $62 down payment and a $4.99 service fee works out to 35.68% APR. The Pay over time page gives no APR or terms. In the UK, Which? reported that Klarna began charging a £5 late fee from 16 March 2023.

Compared with Affirm or PayPal, Klarna stands out for merchant reach and its app bundle. Weigh the privacy terms, the legal matters in the controversies section and the shifts in how customer support is split between AI and human agents.

Screenshots

App Store product image: shopping in the Klarna app
App Store product image: shopping in the Klarna app
App Store product image: managing payments
App Store product image: managing payments
App Store product image: cashback
App Store product image: cashback

Plans & pricing

Prices last verified Nov 11, 2026

Pay in 4

Personal

Free

No subscription fee; paying on time costs nothing and carries no interest. A late fee of up to $7.00 may apply, and total late fees never exceed 25% of the order value at purchase. Soft credit check only; users must be 18 (or the legal age in their state); not available in Hawaii or US territories other than Puerto Rico. Pay in 4 applied for in advance in the app is issued by WebBank with a $1.29–$5.99 service fee and a minimum 25% down payment.

Pay in 30 days

Personal

Contact sales

Klarna lists this option on its homepage, but the pages opened for this review give no terms or fees.

Pay over time

Personal

Contact sales

Financing repaid over time. The Pay over time page gives no APR, term lengths or lender, only that California loans are made under a California Financing Law licence, so there is no list price.

Klarna Membership

Personal

Contact sales

Offered with WebBank for a monthly fee; the official page does not state the amount. It can be cancelled at any time in the app.

Free plan limits
The app and account are free; the Pay in 4 page says paying on time incurs no fees.
Free trial
No free trial
Cancellation & refunds

The help centre has Refunds and Delivery & returns sections and a buyer protection page; the pages opened did not set out detailed refund terms.

Privacy

Klarna's US privacy page says it collects contact, ID and payment data, device data, linked bank transactions and support conversations, and receives data from credit reference and fraud-prevention agencies. The page does not say Klarna sells personal data but says data may be shared with advertising and marketing partners; sharing with unaffiliated third parties can be limited under Settings > Privacy. In 2022 Sweden's data protection authority (IMY) fined Klarna SEK 7.5 million over incomplete and misleading privacy information from 2020; an administrative court of appeal confirmed the amount in 2024.

Official pricing page

Klarna alternatives

Apple Pay logo8.2/10

Apple Pay

Tap-to-pay on iPhone and Apple Watch, no fee, card number hidden from merchants

Free
PayPal logo6.6/10

PayPal

Global wallet for overseas shopping and getting paid, with notable conversion fees

Free

Controversies & incidents

Issues documented by the press, regulators, courts or the vendor itself. Every item is sourced; unproven claims are labelled as allegations. Last researched: Nov 11, 2026

  • Medium impactAllegedLawsuit ·

    Investor class action over the September 2025 IPO

    A Berger Montague notice says a complaint alleges the IPO registration statement understated the risk of sharply rising loss reserves.

    Read the full account

    A 2 January 2026 notice from plaintiffs' firm Berger Montague says a suit has been filed on behalf of investors who bought shares between 7 September 2025 and 22 December 2025, including shares from the September 2025 IPO. The complaint alleges the IPO registration statement understated the risk that loss reserves would rise sharply within months, given that many customers faced financial hardship or were inexperienced. Shares were priced at $40 and stood at about $31.31 when the suit was filed. These are unproven allegations with no ruling; the lead-plaintiff deadline was 20 February 2026.

    Sources:Berger Montague notice: Klarna class action

  • Low impactConfirmedOther ·

    Rehiring human support after an AI-led overhaul

    Per Tech.co citing Bloomberg, the CEO said the AI-focused path was not the right one, and the company is hiring humans again.

    Read the full account

    Per Tech.co (20 May 2025), Klarna cut about 700 jobs in 2022, roughly 10% of its workforce, and by February 2024 its AI assistant handled 75% of customer chats. After complaints about poor support quality, CEO Sebastian Siemiatkowski told Bloomberg the AI-focused path of the past few years was not the right one and said customers must know "there will always be a human if you want". The company is recruiting remote customer service staff.

    Vendor response

    Klarna calls it a "dual-track approach" pairing AI with human support, not a retreat from automation.

    Sources:Tech.co (2025-05-20): AI customer service

  • Low impactConfirmedBilling ·

    Late fees introduced in the UK

    Which? reported that from 16 March 2023 Klarna charges a £5 late fee in the UK.

    Read the full account

    Per Which? (28 February 2023), Klarna previously did not penalise missed payments. The new fee is £5 (25% of order value for orders under £20), at most twice per order, after a seven-day grace period. Missed payments will be reported to Experian and TransUnion.

    Vendor response

    Klarna said it acted on Which? research and will flag late fees throughout the customer journey.

    Sources:Which? (2023-02-28): late fees

Show 1 more
  • Medium impactResolvedRegulator ·

    SEK 7.5 million GDPR fine in Sweden

    Sweden's IMY fined Klarna over incomplete and misleading information on how it handled personal data; an appeals court confirmed the fine in 2024.

    Read the full account

    On 31 March 2022 Sweden's data protection authority (IMY) fined Klarna Bank SEK 7.5 million. IMY found that information on Klarna's website in spring 2020 lacked the purpose and legal basis for processing in one service, gave incomplete and misleading details about which credit reference companies received data, said nothing about transfers outside the EU/EEA and described data subject rights incompletely. Per Verdict (12 March 2024), Sweden's Administrative Court of Appeal set the fine at SEK 7.5 million (about £650k).

    Vendor response

    Per Verdict, Klarna attributed the problems to flaws in a privacy notice used from March to June 2020.

    Sources:IMY (2022-03-31): administrative fine against KlarnaVerdict (2024-03-12): Swedish GDPR fine

Frequently asked questions

Does Pay in 4 run a credit check?

According to the Pay in 4 page, Klarna runs a soft credit check, which does not affect your credit score.

What happens if I pay late?

For Pay in 4 in the US: a late fee of up to $7.00, with total late fees never exceeding 25% of the order value at purchase. Other countries differ; in the UK, Which? reported a £5 fee.

Is Klarna free?

The app is free, and Pay in 4 costs nothing if paid on time. Pay in 4 applied for in advance in the app has a $1.29–$5.99 service fee, and Klarna Membership has a monthly fee the official page does not state.

Does Klarna support Vietnamese?

No. The App Store language list is English plus 18 European languages, with no Vietnamese.

Review evidence & sources14

Scores

Ease of use
8.0
Why this score

App Store 4.9/5, an iOS interface in 19 languages (English and 18 European languages) and payment right at checkout. No Asian languages are listed.

Features
7.8
Why this score

Covers Pay in 4, Pay in 30 days, Pay over time, cards, cashback, savings, investing and eSIM; the pages opened were not enough to judge the depth of each.

Value for money
6.8
Why this score

On-time Pay in 4 is free and late fees are capped. But Pay in 4 applied for in advance in the app carries a service fee (35.68% APR in Klarna's own example), Membership has an undisclosed monthly fee, and the Pay over time page lists no APR.

Performance
7.2
Why this score

No independent measurements; on Trustpilot 77% of reviews are 5-star and 14% are 1-star.

Support
6.8
Why this score

24/7 in-app AI assistant with human agents when needed, plus a 24/7 phone line. In 2025 the CEO told Bloomberg the earlier AI-focused path was not the right one, and the company began rehiring support staff after complaints about support quality.

Privacy & security
6.5
Why this score

IMY fined Klarna SEK 7.5 million in 2022 over incomplete and misleading privacy information, confirmed on appeal in 2024. The policy allows sharing with advertising partners, with an option to limit it.

What users say

Sources

Specs & compatibility
Developer
Klarna
Headquarters
Sweden
Launched
2005
Category
FinanceShopping

Capabilities

  • Mobile app
  • Integrations
  • AI features

Platforms

  • Web
  • iOS
  • Android

Interface languages

  • English
  • Spanish
  • French
  • German
  • Portuguese

Integrations

  • Apple Pay
  • Google Pay
  • Visa

Support

  • Live chat
  • Phone
  • Help center

Change history

  1. Company.Klarna Group went public at $40 per share, per a Berger Montague notice.
  2. Company.The CEO told Bloomberg the AI-focused customer service path was not the right one, and the company began rehiring support staff, per Tech.co.
  3. Price.In the UK, Klarna began charging a £5 late fee (25% of order value for orders under £20).
Full change history (7)
  1. Company.Sweden's data protection authority (IMY) fined Klarna SEK 7.5 million over incomplete and misleading privacy information from 2020.
  2. Company.Klarna secured a full banking licence.
  3. Company.Kreditor was renamed Klarna.
  4. Launch.Three Swedish entrepreneurs founded the company, originally named Kreditor.
About the author

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