# iMMIG 記帳小秘書 vs CostDiary

The clearest difference is price: CostDiary at Free against iMMIG 記帳小秘書's $1.99. iMMIG 記帳小秘書's advantage is rating (4.1 vs 3.0) and in-app purchases (none vs 2). On review sentiment, update cadence, ads and device support there is nothing between them.

CostDiary is free to download; iMMIG 記帳小秘書 costs $1.99 up front. CostDiary sells 2 in-app purchases, starting at $0.99 per month. iMMIG 記帳小秘書 asks for nothing beyond the download.

iMMIG 記帳小秘書 holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: iMMIG 記帳小秘書 has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 73% of iMMIG 記帳小秘書's written reviews are positive against 68% of CostDiary's.

iMMIG 記帳小秘書 ships an update every 6 weeks, CostDiary every 3 weeks. The most recent releases landed on September 21, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | iMMIG 記帳小秘書 | CostDiary |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.1 (7 ratings)](https://appshunter.io/ios/app/immig/id478289911/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/costdiary/id1055571460/reviews) |
| Number of ratings | **7** | 1 |
| Positive reviews | **73.3% of reviews** | 68.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Paid | **Freemium** |
| Size | 18 MB | 108 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jackie Kuang](https://appshunter.io/developer/448566981) | [JiunJiue Liou](https://appshunter.io/developer/508043293) |

## What reviewers say

### iMMIG 記帳小秘書

[App page](https://appshunter.io/ios/app/immig/id478289911)

This app helps you manage personal finances by tracking income, expenses, and bills. It offers features like QR code scanning for invoices, multi-currency accounts, cloud backups, and payment reminders. Secure your data with facial recognition or fingerprint unlock.

**Highlights:** Income and expense tracking, Bill payment reminders, QR code invoice scanning, Multi-currency account management, Cloud backup (Dropbox/iCloud), Biometric security (Face/Fingerprint ID), Reporting and statistics

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is iMMIG 記帳小秘書 free?

iMMIG 記帳小秘書 costs $1.99, with no in-app purchases.

### Is CostDiary free?

CostDiary is free to download, with in-app purchases available.

### Which has better reviews, iMMIG 記帳小秘書 or CostDiary?

iMMIG 記帳小秘書 is rated higher. iMMIG 記帳小秘書 averages 4.1 out of 5 from 7 ratings, while CostDiary averages 3.0 from 1 ratings.

### Do iMMIG 記帳小秘書 or CostDiary have ads?

Neither iMMIG 記帳小秘書 nor CostDiary shows ads.

### Which is updated more often, iMMIG 記帳小秘書 or CostDiary?

iMMIG 記帳小秘書 ships an update every 6 weeks, and CostDiary every 3 weeks. Most recently, iMMIG 記帳小秘書 was updated on September 21, 2026 and CostDiary on August 17, 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.*