Comparison

CostDiary vs Piggy BookKeep

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

Head to head
About

CostDiary

Track daily expenses and record life events with text and stickers. Visualize spending with charts, manage budgets, and secure your data with password protection and iCloud backup. Supports multiple accounts and currencies.

Highlights
  • Daily expense tracking
  • Diary/journal with stickers
  • Spending visualization (charts)
  • Budget management
  • Multi-account and multi-currency support
  • iCloud data backup
  • Password protection
Features
Read full description

CostDiary is not only a daily spending tracker but also a diary app. You can easily track your daily expenses and record your daily life with text and stickers. # DIARY/JOURNAL * Ability to insert stickers and icons into diary * Ability to adjust text color and text size and background color. * Ability to pick background image for your diary # ACCOUNTING * Multi-account support. * Multi-currency support. * Visualize your spendings via line chart and pie chart. * Budget management. * Ability to adjust text styles, themes, icons and colors. * Ability to add a memo, photo or location for each transaction. * Backup data via iCloud. No worry about data loss. * Password protection. * Support creating recurring transactions. Terms of Use: https://DiaryForest.com/terms-of-use/

About

Piggy BookKeep

Features
Read full description

Piggy BookKeep Notebook is an all-in-one life organizer that combines daily expense tracking, handwriting notes, and countdown reminders in a single, easy-to-use app. With a clean interface and short navigation paths, it is designed for students, professionals, freelancers, and families who want to manage spending, capture ideas on the go, and never miss important dates such as birthdays, exams, anniversaries, or project deadlines—all without switching between multiple apps. We prioritize local storage: your ledger entries, handwriting notes, and countdown events are saved primarily on your device for offline access and editing. Excel import and export helps you back up and migrate data when you change phones. The app supports multiple languages, Dark Mode, and optional auto-start controls that you can manage in Settings—off by default, with clear disclosure before you enable them. Expense Tracking & Ledger Tracking money does not have to be complicated. Piggy BookKeep offers a quick “Add Transaction” flow with income and expense categories—ideal for logging purchases right after they happen. Browse your ledger by month and year, with transactions grouped by day so you can review total spending, income, and balance for the current period. Categories include food, transport, shopping, entertainment, housing, medical, education, salary, bonus, and more, with localized category names. Export your data to Excel for backup or sharing, and merge imported spreadsheets into your local ledger after confirmation—useful when moving to a new device. Multiple home screen widgets show monthly summaries, your latest transaction, or recent entries, and refresh automatically after you log new data. Handwriting Notebook Not everything belongs on a keyboard. The built-in handwriting board groups notes by date, with smooth strokes and a pencil-like feel—great for meeting minutes, class notes, shopping lists, and quick sketches. Notes stay on your device for private, offline use. Countdown Reminders Create countdown events for birthdays, trips, exams, holidays, or deadlines and see how many days remain at a glance. Set minute-level reminders with optional repeat rules (daily, weekly, monthly, yearly). Add cover images, crop them for display, and share custom posters with multiple style options. Countdown widgets in small, medium, and large sizes can use your cover art as background; tap to open the app. Data syncs to widgets when you update events. Settings & Personalization Manage language, theme, widgets, auto-start, feedback, Privacy Policy, and Terms of Service from Settings. Supported languages include Simplified Chinese, Traditional Chinese, English, and others. Dark Mode can follow system settings or stay light or dark. Other apps from the same developer show localized names in Chinese or English. Auto-Start Disclosure Auto-start is off by default. If you turn it on in Settings, the app may restore countdown alarms you created after a device reboot, and refresh widgets you already added. This does not initialize advertising or analytics SDKs in the background. You can disable auto-start anytime; details appear in the privacy consent dialog. Permissions The app may request network, storage, notification, and photo library access only when needed for features such as feedback, Excel files, countdown covers, and reminders. Third-party SDKs (e.g., analytics or ads) are described in the in-app Privacy Policy. Ad content is provided by third parties; please evaluate it carefully. Who It Is For Anyone who wants simple expense tracking, handwriting notes, countdown reminders, home screen widgets, multilingual UI, Dark Mode, or Excel backup for personal or small-business budgeting. feedback email : asd272940236@foxmail.com

Screenshots

CostDiary4 screens
Piggy BookKeep4 screens

Verdict

The call

The clearest difference is in-app purchases: Piggy BookKeep at none against CostDiary's 2. CostDiary's advantage is ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price, update cadence 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. CostDiary sells 2 in-app purchases, starting at $0.99 per month. Piggy BookKeep asks for nothing beyond the download.

UpkeepUpdate frequency

CostDiary ships an update every 3 weeks, Piggy BookKeep monthly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
CostDiary versus Piggy BookKeep: the parameters behind the verdict, then further details
ParameterCostDiaryPiggy BookKeep
PriceFreeFree
Rating3.0 (1 ratings) — better—
Positive reviews68.4% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size108 MB6 MB
Age rating4+9+
DeveloperJiunJiue Liou微 韩

In-app purchases

2 purchases

CostDiary

Subscriptions2
  • PRO plan (Monthly)14 Days trial$0.991 Month
  • PRO plan (Yearly)14 Days trial$7.991 Year
None

Piggy BookKeep

No in-app purchases

Questions

Is CostDiary free?
CostDiary is free to download, with in-app purchases available.
Is Piggy BookKeep free?
Piggy BookKeep is free to download, with no in-app purchases.
Do CostDiary or Piggy BookKeep have ads?
Piggy BookKeep shows ads; CostDiary does not.
Which is updated more often, CostDiary or Piggy BookKeep?
CostDiary ships an update every 3 weeks, and Piggy BookKeep monthly. Most recently, CostDiary was updated on October 24, 2026 and Piggy BookKeep on October 9, 2026.

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