# PaperDue vs Time Zone Difference Planner

The clearest difference is update cadence: PaperDue at weekly against Time Zone Difference Planner's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PaperDue sells 1 one-off in-app purchase and Time Zone Difference Planner sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PaperDue ships an update weekly, Time Zone Difference Planner every 4 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | PaperDue | Time Zone Difference Planner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/paperdue-deadline-tracker/id6761820921/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free | — |
| Size | 3 MB | 5 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [梓豪 朱](https://appshunter.io/developer/1891542786) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### PaperDue

[App page](https://appshunter.io/ios/app/paperdue-deadline-tracker/id6761820921)

Never miss a crucial submission deadline for AI research conferences. This app provides live countdowns, smart notifications, and conference rankings to help academics stay organized and focused on their work.

**Highlights:** Live countdown tracker for hundreds of conferences, Smart reminder notifications, CORE & CCF conference rankings, Dynamic Island countdown ticker, Home & Lock Screen widgets, Timeline & calendar view, Multi-timezone support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PaperDue Pro | $1.99 | one-time |


### Time Zone Difference Planner

[App page](https://appshunter.io/ios/app/time-zone-difference-planner/id6772262657)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| World Clock Weekly | $2.99 | per 7 days |
| Remote Work Yearly | $14.99 | per year |
| UTC Converter Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is PaperDue free?

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

### Is Time Zone Difference Planner free?

Time Zone Difference Planner is free to download, with in-app purchases available.

### Do PaperDue or Time Zone Difference Planner have ads?

Neither PaperDue nor Time Zone Difference Planner shows ads.

### Which is updated more often, PaperDue or Time Zone Difference Planner?

PaperDue ships an update weekly, and Time Zone Difference Planner every 4 months. Most recently, PaperDue was updated on October 31, 2026 and Time Zone Difference Planner on October 31, 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.*