# CostDiary vs Piggy BookKeep

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.

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.

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

## The numbers

| Metric | CostDiary | Piggy BookKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/costdiary/id1055571460/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 68.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Freemium | — |
| Size | 108 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [JiunJiue Liou](https://appshunter.io/developer/508043293) | [微 韩](https://appshunter.io/developer/1605809045) |

## What reviewers say

### CostDiary

[App page](https://appshunter.io/ios/app/costdiary/id1055571460)

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:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO plan (Monthly) | $0.99 | per month |
| PRO plan (Yearly) | $7.99 | per year |


### Piggy BookKeep

[App page](https://appshunter.io/ios/app/piggy-bookkeep-quick-ledger/id6783659299)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*