# D2I vs Shift Calendar Planner

The clearest difference is in-app purchases: D2I at none against Shift Calendar Planner's 5. D2I also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Shift Calendar Planner sells 4 in-app purchases, starting at $1.99 per month. D2I asks for nothing beyond the download.

D2I ships an update fortnightly, Shift Calendar Planner every 3 weeks. Both last shipped on September 26, 2026.

## The numbers

| Metric | D2I | Shift Calendar Planner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (27 ratings)](https://appshunter.io/ios/app/shift-calendar-planner/id6472920612/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | — | 80.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 38 MB | 61 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Takaoka Anestesia](https://appshunter.io/developer/1592570656) | [Bivis](https://appshunter.io/developer/1124507805) |

## What reviewers say

### D2I

[App page](https://appshunter.io/ios/app/d2i/id1592570654)

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

**In-app purchases:** none


### Shift Calendar Planner

[App page](https://appshunter.io/ios/app/shift-calendar-planner/id6472920612)

Manage your work shifts, personal events, and time off with this intuitive calendar app. Track earnings, create payout reports, and receive schedule conflict alerts. Designed for professionals working rotating schedules.

**Highlights:** Automatic shift schedules, Earnings tracking, Payout reports, Time-off planning, Calendar synchronization, Home screen widgets, Cloud backup

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Calendar Monthly | $1.99 | per month |
| Shift Calendar Monthly | $2.99 | per month |
| Shift Calendar Annual | $15.99 | per year |
| Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is D2I free?

D2I is free to download, with no in-app purchases.

### Is Shift Calendar Planner free?

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

### Do D2I or Shift Calendar Planner have ads?

Neither D2I nor Shift Calendar Planner shows ads.

### Which is updated more often, D2I or Shift Calendar Planner?

D2I ships an update fortnightly, and Shift Calendar Planner every 3 weeks. Most recently, D2I was updated on September 26, 2026 and Shift Calendar Planner on September 26, 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.*