Comparison

QS vs Flashchange

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

QS

Features
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QS-DIW is a Digital Identity Wallet (DIW) app. The app is used by people to authenticate and sign payments and/or contracts as well as present verifiable information (attributes) about themselves. The person must perform Strong Customer Authentication (SCA) to complete all eID transactions. A DIW app can be used by a person to: - Log into a web site. - Gain access to e.g. a secure area, hotel room, sports or entertainment venue. - Open a bank account remotely, involving Know Your Customer (KYC). QS-DIW also meets the PSD2 requirement to perform SCA on payments. When eID credentials are issued to the person by a bank, the app can also be used to:- - Make payments at a POI (e.g. browser) / POS (in a shop). - Sign a contract and/or a direct debit mandate simultaneously. - Review and approve personal and corporate payment requests. - Perform multi-user approvals on payments.  Users can review summary information and optionally drill into the detail of an eID or payment order. They can approve or cancel orders and also monitor ongoing status. Status is categorised with red/amber/green colour coding. All rejects are clearly flagged, with reason information. The user SCA credentials are represented by an asymmetric (public/private) key pair, backed by X.509 (identity and attribute) certificates. The private key element resides within and never leaves the Secure Element of the smartphone. The private key is unlocked via the use of either the device’s biometric sensor and/or a PIN. The user’s biometric data also never leaves the smartphone. The SCA proof is represented by an Advanced Electronic Signature (AdES). The SCA proof is dynamically linked to the eID/payment/consent data, plus audit trail and device attestation information. The following payment formats are fully supported:- - PAIN.001 v3 - Credit Transfer - PAIN.001 v9 - Credit Transfer - PAIN.008 v2 - Direct Debit - PAIN.002 v3 - Payment Status - PAIN.002 v10 - Payment Status - ACMT.007 v1 - Account Opening - PAIN.009 v1 - E-Mandate - PAIN.009 v6 - E-Mandate - PAIN.010 v1 - E-Mandate Amendment - PAIN.010 v6 - E-Mandate Amendment - Berlin Group NextGenPSD2 JSON formats PSD2 = DIRECTIVE (EU) 2015/2366 on payment services in the internal market GDPR = REGULATION (EU) 2016/679 on the protection of natural persons

About

Flashchange

This app facilitates the quick and easy exchange of digital assets, including gift cards, for cash. It offers instant payments, competitive rates, and a user-friendly interface for a seamless trading experience. 24/7 customer support is available.

Highlights
  • Fast gift card trading
  • Convert digital assets to cash
  • Instant payments
  • Competitive exchange rates
  • User-friendly interface
  • 24/7 customer support
Features
Read full description

Are you looking for the best place to trade your gift cards? FlashChange is your go-to app for fast, seamless trading. FlashChange is a trading platform that helps you convert digital assets to cash fast. Whether you're buying or selling these digital assets, our platform is designed to make the process smooth and stress-free for you. Why Use FlashChange? Instant Payments: Payments are instant on the FlashChange app. No unnecessary delays, no lags. Best Deals: We offer some of the most competitive rates in the market, ensuring you get the most value for your digital assets. Seamless Experience: Our user-friendly interface ensures a smooth trading experience for you. 24/7 Customer Support: Our customer service department is available round the clock to ensure that you get all the support you need with trading on the app. Ready for the FlashChange experience? Download the app now!

Screenshots

QS2 screens
Flashchange4 screens

Verdict

The call

The clearest difference is update cadence: Flashchange at every 2 weeks against QS's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

QS ships an update every 2 months, Flashchange every 2 weeks. The most recent releases landed on October 1, 2026 and October 16, 2026 respectively.

Scorecard1 real difference · 9 level
QS versus Flashchange: the parameters behind the verdict, then further details
ParameterQSFlashchange
PriceFreeFree
Rating—4.6 (1.1K ratings) — better
Positive reviews—75.5% of reviews
Number of ratings—1.1K — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size18 MB80 MB
Age rating4+4+
DeveloperQuali-Sign LTDFlashchange Limited

Bugs and requests

QS

Not enough reviews yet to summarise bugs or requests.

Flashchange

Reported bugs

5 issues
  • Withdrawal PIN entry not processing correctly
  • Login failures preventing account access
  • App not opening or crashing
  • Transaction pending without resolution
  • Account access issues with funds trapped inside

Requested features

4 requests
  • Working WhatsApp contact channel for customer support
  • Direct phone number for customer inquiries
  • Complaint and feedback box system
  • Improved login recovery options

In-app purchases

None

QS

No in-app purchases

None

Flashchange

No in-app purchases

Questions

Is QS free?
QS is free to download, with no in-app purchases.
Is Flashchange free?
Flashchange is free to download, with no in-app purchases.
Do QS or Flashchange have ads?
Neither QS nor Flashchange shows ads.
Which is updated more often, QS or Flashchange?
QS ships an update every 2 months, and Flashchange every 2 weeks. Most recently, QS was updated on October 1, 2026 and Flashchange on October 16, 2026.

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