KB+ vs convertFrog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KB+
Manage your finances with a user-friendly app that consolidates banking services. Open accounts, order cards, make payments, and save for the future, all in one place. Customize your account and enjoy multicurrency features for seamless global transactions.
- Multicurrency account
- Customizable account number and name
- Savings accounts and envelopes
- Card ordering and management
- Drag and drop payments
- Biometric login (Touch ID/Face ID)
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SIMPLE TO USE Track all your services in one user-friendly app. You can easily order and manage individual services. PLANS Choose a plan that fits your lifestyle. A plan is a set of products and services for everyday banking, which includes an account, a card, payments, and ATM withdrawals. MULTICURRENCY ACCOUNT Use multiple currencies in one account. You can exchange money within your account in a few seconds and simply pay in the local currency abroad, wherever you go. CHOOSE YOUR OWN ACCOUNT NUMBER AND NAME IT Set your own account number, for example, your birthday or wedding anniversary. You can name the account whatever you like. SAVINGS ACCOUNT AND ENVELOPES Open a savings account online and have up to 10 savings envelopes. Organize your money into envelopes for whatever you need. CARD ORDERING AND MANAGEMENT In KB+ you can order, unlock, and lock a card or view the PIN. Choose one of the designs offered and add your card to Apple Pay. KB KLÍČ IS NOW PART OF KB+ You no longer need 2 apps to verify payments and logins. Now you can do everything in the KB+ app. DRAG AND DROP PAYMENTS Move money quickly and easily between your accounts and savings envelopes with a simple drag and drop. TOUCH ID AND FACE ID Make app login and payment verification easier with Touch ID or Face ID. Just use your finger or scan your face. 3D TOUCH Long press the KB+ app icon on your mobile to choose from the most used features. SPOTLIGHT Explore the ability to search KB+ app features through Spotlight. BUILDING SAVINGS Get state support of up to 2,000 CZK per year and enrich your savings with a guaranteed interest rate for 6 years. EXTRA SERVICE CESTOVÁNÍ Insure yourself against unexpected events on the road. With the extra service Cestování, you won't be caught off guard by a traffic accident, lost luggage, or a trip cancellation. The service is valid all year round. SUPPLEMENTARY PENSION SAVINGS Save and invest for retirement. In KB+, you can now arrange a pension not only for yourself, but for your child too. In addition, your child can collect a third of their own contributions from the age of 18. CHILDREN'S SAVINGS ACCOUNT Save for your child with a great interest rate. You can open an account via the application. Additionally, your child can manage their own account from the age of 6, and from 15, they can open an account on their own. PLAN FOR ENTREPRENEURS Open and manage your business account in the app. Share access to it with managers or your accountant. With higher-level plans, you also get a multicurrency account for free.
convertFrog
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convertFrog is a fast, minimal currency converter built around one idea: you should see every amount converted at once, without typing. Pick two currencies and scroll. The left column shows amounts in the currency you convert from, the right column shows the converted amounts. Prices at a market stall, a restaurant bill, a hotel booking: just find the number in the left column and read the answer on the right. SWIPE TO SCALE • Swipe left to multiply the step between rows by 10: 1, 2, 3 becomes 10, 20, 30, then 100, 200, 300 and beyond. • Swipe right to divide by 10 for small amounts: 0.1, 0.2, 0.3. • Tap any row to reveal the steps in between. • Long-press any amount to copy it. DESIGNED TO STAY OUT OF YOUR WAY • Two currencies, one clean list. No clutter, no ads. • Swap the pair with one tap, or by swiping across the header. • Search all world currencies by code, country or name, with the popular ones on top. • Dark, easy-on-the-eyes design. YOUR RATES, YOUR RULES • Set a custom rate for any pair, for example the rate your bank or exchange bureau actually gives you, and switch back to the live rate any time. • "Round the numbers" simplifies amounts for quick mental maths. • Choose a home currency so your conversions start where you want. WORKS ANYWHERE • Live exchange rates are refreshed automatically and cached on your device, so the app keeps working offline with the last downloaded rates. PRIVATE BY DESIGN • No account, no tracking, no analytics, no ads. Your settings stay on your device. Exchange rates are provided by open.er-api.com (ExchangeRate-API), are indicative only and may be delayed. They are not financial advice; actual rates charged by banks and providers differ.
Screenshots
Verdict
The clearest difference is update cadence: convertFrog at daily against KB+'s every 3 weeks. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
KB+ ships an update every 3 weeks, convertFrog daily. The most recent releases landed on November 14, 2026 and November 10, 2026 respectively.
| Parameter | KB+ | convertFrog |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (190 ratings) — better | — |
| Positive reviews | 22.2% of reviews | — |
| Number of ratings | 190 — better | — |
| Update frequency | Every 3 weeks | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 574 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Komercni banka a.s. | Matteo Limardo |
In-app purchases
KB+
No in-app purchases
convertFrog
No in-app purchases









