# Only Birthdays vs Know Your Contacts

The clearest difference is in-app purchases: Only Birthdays at none against Know Your Contacts's 2. Know Your Contacts's advantage is iOS requirement (12.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Know Your Contacts sells 2 in-app purchases, starting at $0.99 per month. Only Birthdays asks for nothing beyond the download.

Only Birthdays ships an update every 3 weeks, Know Your Contacts fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Only Birthdays | Know Your Contacts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/only-birthdays/id6447131006/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 33 MB | 52 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DDGA Ltd.](https://appshunter.io/developer/1478768302) | [Krykk Ltd](https://appshunter.io/developer/1794120288) |

## What reviewers say

### Only Birthdays

[App page](https://appshunter.io/ios/app/only-birthdays/id6447131006)

Easily track all your important dates with this app. Get timely reminders for birthdays and see how many days are left until the event. It offers a clean interface with light and dark modes, plus curated gift suggestions.

**Highlights:** Birthday tracking, Contact import, Customizable reminders, Days until birthday display, Age calculation, Gift ideas, Light and dark modes

**Features:** macOS Compatibility

**In-app purchases:** none


### Know Your Contacts

[App page](https://appshunter.io/ios/app/know-your-contacts/id6572281032)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| One time | $9.99 | one-time |


## Frequently asked questions

### Is Only Birthdays free?

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

### Is Know Your Contacts free?

Know Your Contacts is free to download, with in-app purchases available.

### Do Only Birthdays or Know Your Contacts have ads?

Neither Only Birthdays nor Know Your Contacts shows ads.

### Which is updated more often, Only Birthdays or Know Your Contacts?

Only Birthdays ships an update every 3 weeks, and Know Your Contacts fortnightly. Most recently, Only Birthdays was updated on November 3, 2026 and Know Your Contacts on November 4, 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.*