Convert FX vs Sub Sook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Convert FX
This app offers a fast and simple way to convert between global currencies. Track exchange rates, save favorites, and view trends with a clean, native iOS interface. It's ideal for travelers, international shoppers, and market watchers.
- Simple currency conversion
- Exchange rate tracking
- Favorite currency pairs
- Clean charts and trends
- Home Screen widgets
- Dark mode support
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Convert FX is a lightweight currency converter designed for iPhone with a clean, modern experience focused on simplicity and speed. Convert between major global currencies with an easy-to-use interface, exchange rate tracking, favorites, charts, widgets, and dark mode support — all built with a native iOS feel. Features: • Simple currency conversion • Exchange rate tracking • Save favorite currency pairs • Clean charts and trends • Home Screen widgets • Dark mode support • Fast and lightweight design • Built for iPhone and iPad Track currencies including: USD, EUR, GBP, JPY, CAD, AUD, CHF, CNY and more. Whether you’re traveling, studying markets, shopping internationally, or checking daily exchange rates, Convert FX helps you quickly access the currencies you care about most. Designed to feel simple, fast, and native on iPhone.
Sub Sook
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Sub Sook keeps every subscription, recurring bill and installment plan in one calm place — and reminds you before you're charged. No account. No sign-in. No cloud. Everything stays on your device. KNOW WHAT'S COMING • Monthly total and what's due next, readable in a second • A 14-day strip shows at a glance which days money goes out • Calendar view of every upcoming charge • Reminders 3, 7 or 14 days before billing — pick what suits you • Free-trial and "cancel by" alerts so a trial never turns into an unwanted charge STAY ON TOP OF EVERY PAYMENT • Track subscriptions, recurring bills (rent, utilities, phone, internet) and installment plans • Mark items paid right from the notification and keep a payment history • Installment progress — see how much is paid and what's left • Set a monthly budget and get warned when you go over SPOT WASTE • Insights flag duplicate services, subscriptions you haven't used and price increases • Spending by category, 6-month trends and a ranking of your biggest costs • Pause or cancel an item and watch your monthly total drop PRIVATE BY DESIGN • Your data lives only in the app on your device — nothing is uploaded • Optional Face ID / Touch ID lock • Daily automatic backups on your device, plus a backup file you can save anywhere and restore on a new phone — free for everyone MADE FOR EVERYDAY USE • Quick-add for popular services like Netflix, Spotify, YouTube, iCloud+, ChatGPT, Disney+ and more • 16 currencies (USD, EUR, GBP, JPY, THB and more) with automatic conversion • English and Thai, light and dark mode SUB SOOK PRO • Up to 100 active items (Free: 10) • Export PDF and CSV reports, an annual report and a calendar (.ics) file • Advanced notification rules • Home screen widgets Pro is an auto-renewing subscription. Payment is charged to your Apple ID at confirmation of purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://teezer.cloud/legal/subsook/privacy/
Screenshots
Verdict
The clearest difference is iOS requirement: Sub Sook at 16.4 against Convert FX's 18.6. On price, update cadence, ads and in-app purchases 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. Convert FX sells 1 one-off in-app purchase and Sub Sook sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.
| Parameter | Convert FX | Sub Sook |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 5 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmytro Polokhalo | Phaisan Thauaonsamut |
In-app purchases
Convert FX
- Convert FX Pro$2.99
Sub Sook
- Premium (Monthly)$1.991 Month
- Premium (Yearly)$19.991 Year









