Comparison

DarkBook vs Currency Ai

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

Head to head
About

DarkBook

A minimalist budget tracker with a focus on a dark, eye-friendly interface. It offers fast, simplified bookkeeping with multi-ledger, multi-account, and multi-member support. Analyze your spending and asset trends with clear visualizations.

Highlights
  • Optimized dark theme
  • Local data storage
  • Fast bookkeeping with gestures
  • Multi-ledger support
  • Multi-account management
  • Revenue and expenditure analysis
  • Asset trend tracking
Features
Read full description

【Inspiration】 The idea is “highlight and focus.” When using everyday editing software, the author always chooses a dark, eye-friendly palette if given the choice. It reduces visual fatigue and makes text stand out. Bookkeeping apps work the same way. The two times I record expenses most often are (1) right after a transaction and (2) before bed—one in bright light, one in dim light. In both cases, a high-contrast dark theme brings the content forward. That is why DarkBook was built: optimized for dark mode, with a simplified interface that keeps text at the center and creates a more focused space for tracking your money. 【Features】 Optimized dark theme: carefully tuned dark palettes for long sessions, plus multiple themes (including light themes) you can switch anytime. Offline on device: your data stays on your device. No sign-up required—start tracking right away. Quick entry: gesture support and fewer steps; built-in calculator keys (+ − × ÷) help you log faster. Multiple books: life, work, travel, baby… keep a separate book for each scenario. Multiple accounts: manage cash, credit cards, and virtual-currency accounts separately. Multiple members: tag spending for yourself, your partner, children, or parents. Multiple currencies: support for major world currencies and virtual currencies, with rates and conversion. Income & expense analysis: custom date ranges show where money went, to whom, and from which account. Asset trends: track assets and net worth over time. Budgets: set budgets for your book and expense categories. Account transfers: a small feature, but closer to how money really moves. Bill search: find entries by note, amount, or account; filter by date, category, member, and more. CSV import/export: export bills to CSV for editing on a computer, or import in bulk. iCloud backup: back up to iCloud and sync across devices signed in with the same Apple ID. Clean and ad-free: we do not want ads to get in your way. 【Auto-renewable subscription】 1. Subscription service: a subscription means service fees are charged on a recurring basis. An annual plan is currently available. Your subscription renews automatically within 24 hours before the end of each period unless you turn off auto-renewal or we discontinue the service. 2. Price: the annual subscription price is shown in the App Store for your region and may change during promotions. If you subscribe, any new price applies in the next billing period. Payment is charged to your Apple ID upon confirmation. 3. Refunds: fees for the current billing period are generally non-refundable, subject to Apple Media Services Terms and applicable local law. If a free trial is offered, cancel before it ends to avoid being charged. 4. Cancel subscription: subscriptions renew automatically. To avoid renewal, turn off auto-renewal at least 24 hours before the current period ends. Manage or cancel in Settings > Apple ID > Subscriptions. 【Terms】 Terms of Use: https://www.zotiger.com/darkbook-terms-of-use-en Privacy Policy: https://www.zotiger.com/darkbook-privacy-en 【Contact】 Email: service@zotiger.com

About

Currency Ai

Features
Read full description

Currency Ai - fast, clean currency conversion Check live exchange rates, convert amounts in real time, and track rate history - all in one elegant app. Live rates for 30+ world currencies Quick converter with numpad and live rate preview Charts and rate trends over time Historical rates for any past date (calendar picker) Favorites list right on your dashboard Light and dark mode to match your style Multi-language support Currency Ai is the perfect tool for travelers, investors, and anyone who wants exchange rates always within reach - without the clutter.

Screenshots

DarkBook4 screens
Currency Ai3 screens

Verdict

The call

The clearest difference is in-app purchases: Currency Ai at none against DarkBook's 2. Currency Ai also leads on update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement 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. DarkBook sells 2 in-app purchases, starting at $1.49 per year. Currency Ai asks for nothing beyond the download.

UpkeepUpdate frequency

DarkBook ships an update weekly, Currency Ai every 3 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 8 level
DarkBook versus Currency Ai: the parameters behind the verdict, then further details
ParameterDarkBookCurrency Ai
PriceFreeFree
Rating4.3 (3 ratings) — better—
Positive reviews88.9% of reviews—
Number of ratings3 — better—
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size26 MB28 MB
Age rating4+4+
DeveloperChongqing Zhouhu Technology Co.,LtdArmand Gadecki

In-app purchases

2 purchases

DarkBook

Subscriptions1
  • Pay per year$1.491 Year
One-time1
  • Life member$3.99
None

Currency Ai

No in-app purchases

Questions

Is DarkBook free?
DarkBook is free to download, with in-app purchases available.
Is Currency Ai free?
Currency Ai is free to download, with no in-app purchases.
Do DarkBook or Currency Ai have ads?
Neither DarkBook nor Currency Ai shows ads.
Which is updated more often, DarkBook or Currency Ai?
DarkBook ships an update weekly, and Currency Ai every 3 days. Most recently, DarkBook was updated on October 24, 2026 and Currency Ai on October 14, 2026.

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