# 4DI vs FirstSeed Planner

The clearest difference is in-app purchases: 4DI at none against FirstSeed Planner's 3. 4DI also leads on iOS requirement (18.6 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. FirstSeed Planner sells 3 in-app purchases, starting at $3.49 per month. 4DI asks for nothing beyond the download.

4DI ships an update every 5 days, FirstSeed Planner every 3 days. Both last shipped on October 19, 2026.

## The numbers

| Metric | 4DI | FirstSeed Planner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/firstseed-planner/id6802022248/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 81.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 5 MB | 41 MB |
| Requires iOS | **18.6** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Poetzsch](https://appshunter.io/developer/1860642630) | [FirstSeed Inc](https://appshunter.io/developer/1321260277) |

## What reviewers say

### 4DI

[App page](https://appshunter.io/ios/app/4di-data-integrity-tool/id6760180866)

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

**In-app purchases:** none


### FirstSeed Planner

[App page](https://appshunter.io/ios/app/firstseed-planner/id6802022248)

Organize your day with a single-page view of your calendar, notes, and to-do list. Seamlessly integrate existing calendars and add photos or formatted text to your notes. Unfinished tasks can be carried over to the next day.

**Highlights:** Single-page daily view, Integrates with existing calendars, Add photos and formatted notes, Carry over unfinished tasks, Search across events, notes, and reminders, Export to PDF and Markdown, Customizable display options

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $3.49 | per month |
| Pro Yearly | $29.99 | per year |
| Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is 4DI free?

4DI is free to download, with no in-app purchases.

### Is FirstSeed Planner free?

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

### Do 4DI or FirstSeed Planner have ads?

Neither 4DI nor FirstSeed Planner shows ads.

### Which is updated more often, 4DI or FirstSeed Planner?

4DI ships an update every 5 days, and FirstSeed Planner every 3 days. Most recently, 4DI was updated on October 19, 2026 and FirstSeed Planner on October 19, 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.*