# Ovulation Date Calculator vs VaxBuddy

The clearest difference is ads: VaxBuddy at none against Ovulation Date Calculator's shown. VaxBuddy also leads on iOS requirement (13.0 vs 16.6). Ovulation Date Calculator's advantage is update cadence (every 3 days vs every 2 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ovulation Date Calculator ships an update every 3 days, VaxBuddy every 2 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Ovulation Date Calculator | VaxBuddy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 months |
| Size | 30 MB | 43 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Abdelkarem Bahy Abdelkarem](https://appshunter.io/developer/1848738097) | [Vaxbuddy LLC](https://appshunter.io/developer/1875550342) |

## What reviewers say

### Ovulation Date Calculator

[App page](https://appshunter.io/ios/app/ovulation-date-calculator/id6754885156)

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

**In-app purchases:** none


### VaxBuddy

[App page](https://appshunter.io/ios/app/vaxbuddy/id6758889655)

**In-app purchases:** none


## Frequently asked questions

### Is Ovulation Date Calculator free?

Ovulation Date Calculator is free to download, with no in-app purchases.

### Is VaxBuddy free?

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

### Do Ovulation Date Calculator or VaxBuddy have ads?

Ovulation Date Calculator shows ads; VaxBuddy does not.

### Which is updated more often, Ovulation Date Calculator or VaxBuddy?

Ovulation Date Calculator ships an update every 3 days, and VaxBuddy every 2 months. Most recently, Ovulation Date Calculator was updated on October 24, 2026 and VaxBuddy on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*