CurrenX · vs Sinkstack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CurrenX ·
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CurrenX is the ultimate, elegant currency converter and calculator. Whether traveling, shopping, or tracking global markets, CurrenX offers unparalleled utility and cutting-edge visual aesthetics. VISUAL EXCELLENCE (GLASSMORPHISM) - Gorgeous Neon Dark Mode: Sleek, battery-efficient design. - Translucent Glassmorphism: Smooth frosted-glass overlays. - Fluid Micro-Animations: Delightful transitions and responsive haptic feedback. LIVE GLOBAL EXCHANGE RATES - Universal Coverage: Convert 150+ global fiat currencies. - Reliable Updates: Fast, precise data from trusted providers. - Favorites List: Pin frequently used currencies for instant access. OFFLINE CASH MODE - Offline Functionality: Auto-saves the latest rates when online. - Smart Caching: Switches to Offline Mode instantly without internet. - Secure Local Database: Perform conversions offline without lags. INTEGRATED CALCULATOR - Simultaneous Conversion: Perform math directly inside the conversion field. - Live Updates: Watch target currencies update in real-time as you type. CUSTOM DIGITAL KEYBOARD - Optimized Layout: Large, high-contrast buttons for absolute speed. - No UI Obstruction: Stays anchored at the bottom, keeping fields visible. GLOBAL LOCALIZATION - Multi-Language: English, Turkish, Russian, and Arabic support. - RTL Layout: Perfect right-to-left mirroring for Arabic users. PRIVACY-FIRST & AD-FREE - Zero Tracking: We do not harvest or share your personal data. - High Performance: Fast startup times and solid performance. - Ad-Free Premium: Enjoy a completely distraction-free environment. SUBSCRIPTION PRICING AND TERMS CurrenX offers an auto-renewing Monthly subscription at $3.99/month (with a 3-day free trial) and a Yearly subscription at $29.99/year to provide unlimited, ad-free access to premium features. - Payment will be charged to your Apple ID Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period. - You can manage or turn off auto-renew in your Account Settings any time after purchase. - Any unused portion of a free trial period will be forfeited when you purchase a subscription. LEGAL AND POLICY LINKS: - Privacy Policy: https://currenx-legal-portal.netlify.app/privacy_policy.html - Terms of Use: https://currenx-legal-portal.netlify.app/terms_of_use.html
Sinkstack
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Sinkstack turns irregular bills into a plan for every paycheck. Create a sinking fund for each bill you only see a few times a year, such as car insurance, holidays, renewals and repairs, and Sinkstack shows what to set aside from each upcoming paycheck so each one is covered by its due date. NEW IN 4.0: PAYCHECK PLAN Choose how often you are paid and one payday. Each of your next 4, 6 or 12 paychecks then lists what to set aside for every fund: • Funds with a due date spread what they still need evenly across the paydays before that date, exact to the cent. • Recurring bills start their next cycle automatically after each due date. • Funds without a due date use the contribution you planned. • Bills that land before your next payday are flagged with the amount still needed. • Enter your take-home pay (optional) to see what is left after the set-asides. • Book the next paycheck's set-asides as deposits in one step, or export the plan as CSV. ALSO NEW • Backup & Restore: one file with every fund, ledger entry, pay schedule and Payday Bridge plan. Restore checks the whole file first and saves a copy of your current data before replacing anything. • Widgets: a Next Payday countdown (you set the schedule in the widget; it never shows balances) and Quick Actions for the allocator, Paycheck Plan and Payday Bridge. • Control Center control and Siri / Shortcuts actions to open the allocator, Paycheck Plan or Payday Bridge. • A redesigned tab layout: Funds, Paychecks, Calendar, Insights and Settings. EVERYTHING ELSE YOU ALREADY HAVE • Unlimited sinking funds with goals, due dates, weekly to annual contributions, revolving funds and recurring bills that reset after each due date. • Paycheck allocator: split new money across your funds proportionally, by priority or evenly, booked as dated deposits. • Payday Bridge: put income and payments on real dates to find the lowest balance before payday and test a late payday. • Funding Calendar: 12 months of set-asides and bill dates, with busy months marked. • Insights, catch-up options for funds that fell behind, a what-if solver, PDF statements and CSV export. • 60+ templates for common irregular expenses. PRIVATE BY DESIGN No account, no bank login, no ads, no tracking. Your data stays on your device. Amounts use exact decimal math. One purchase. No subscription. Sinkstack is a planning tool. It does the arithmetic on the numbers you enter; it does not move money, connect to a bank or give financial advice. iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: CurrenX · at Free against Sinkstack's $0.99. CurrenX · also leads on iOS requirement (13.0 vs 17.0). Sinkstack's advantage is in-app purchases (none vs 2) and update cadence (every 6 days vs every 6 weeks). On ads 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
CurrenX · is free to download; Sinkstack costs $0.99 up front. CurrenX · sells 2 in-app purchases, starting at $1.99 per month. Sinkstack asks for nothing beyond the download.
CurrenX · ships an update every 6 weeks, Sinkstack every 6 days. Both last shipped on November 5, 2026.
| Parameter | CurrenX · | Sinkstack |
|---|---|---|
| Price | Free — better | $0.99 |
| Update frequency | Every 6 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Best chart rank | — | #38 — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Ali Taghiyev | Robert Corbin |
In-app purchases
CurrenX ·
- CurrenX Pro Monthly3 Days trial$1.991 Month
- CurrenX Pro Yearly$9.991 Year
Sinkstack
No in-app purchases







