# i 統一發票 電子發票管理工具 vs iPTT 時光機

The clearest difference is ads: iPTT 時光機 at none against i 統一發票 電子發票管理工具's shown. iPTT 時光機 also leads on update cadence (every 4 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

i 統一發票 電子發票管理工具 ships an update every 2 months, iPTT 時光機 every 4 days. The most recent releases landed on September 29, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | i 統一發票 電子發票管理工具 | iPTT 時光機 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (376 ratings)](https://appshunter.io/ios/app/i/id526625386/reviews)** | — |
| Number of ratings | **376** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 34 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [GETONE TECH CO.](https://appshunter.io/developer/526625809) | [Yuan-Yi Chang](https://appshunter.io/developer/784363421) |

## What reviewers say

### i 統一發票 電子發票管理工具

[App page](https://appshunter.io/ios/app/i/id526625386)

This app helps users automatically check lottery winning numbers for unified invoices and manage their digital receipts. It offers features for scanning paper invoices, tracking spending, and donating to charity. Users receive timely notifications for winning numbers and can easily access their transaction history.

**Highlights:** Automatic lottery checking for unified invoices, Scan and manage paper invoices, Digital receipt management, Spending analysis and statistics, Donation support for cloud invoices, Push notifications for winning numbers

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

**In-app purchases:** none


### iPTT 時光機

[App page](https://appshunter.io/ios/app/iptt/id6787298124)

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

**In-app purchases:** none


## Frequently asked questions

### Is i 統一發票 電子發票管理工具 free?

i 統一發票 電子發票管理工具 is free to download, with no in-app purchases.

### Is iPTT 時光機 free?

iPTT 時光機 is free to download, with no in-app purchases.

### Do i 統一發票 電子發票管理工具 or iPTT 時光機 have ads?

i 統一發票 電子發票管理工具 shows ads; iPTT 時光機 does not.

### Which is updated more often, i 統一發票 電子發票管理工具 or iPTT 時光機?

i 統一發票 電子發票管理工具 ships an update every 2 months, and iPTT 時光機 every 4 days. Most recently, i 統一發票 電子發票管理工具 was updated on September 29, 2026 and iPTT 時光機 on September 11, 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.*