# D vs i视康

The clearest difference is in-app purchases: i视康 at none against D's 1. D's advantage is update cadence (every 2 months vs every 40 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. D sells 1 one-off in-app purchase. i视康 asks for nothing beyond the download.

D ships an update every 2 months, i视康 every 40 months. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | D | i视康 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (5 ratings)](https://appshunter.io/ios/app/d-day/id1435692878/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 40 months |
| Monetization | Free with in-app purchases | — |
| Size | 64 MB | 16 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wing Yin SO](https://appshunter.io/developer/1435692877) | [亮 董](https://appshunter.io/developer/979824099) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-day/id1435692878)

Keep track of significant dates and events with this reminder app. It offers custom backgrounds, event categorization, and the ability to share or save events. Widgets are also available for quick access.

**Highlights:** Event reminders, Share events, Save events to photo library, Repeat events, Backup and recover events, Custom event backgrounds, Categorized events, Event widgets

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| D-Day | $0.99 | one-time |


### i视康

[App page](https://appshunter.io/ios/app/i/id1625046224)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is i视康 free?

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

### Do D or i视康 have ads?

Neither D nor i视康 shows ads.

### Which is updated more often, D or i视康?

D ships an update every 2 months, and i视康 every 40 months. Most recently, D was updated on October 3, 2026 and i视康 on October 7, 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.*