# Natality vs KnowWhen

The clearest difference is price: Natality at Free against KnowWhen's $4.99. Natality also leads on update cadence (every 8 days vs every 3 months) and iOS requirement (15.0 vs 18.0). KnowWhen's advantage is in-app purchases (none vs 8). On ads and device support there is nothing between them.

Natality is free to download; KnowWhen costs $4.99 up front. Natality sells 7 in-app purchases, starting at $7.99 per month. KnowWhen asks for nothing beyond the download.

Natality ships an update every 8 days, KnowWhen every 3 months. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Natality | KnowWhen |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knowwhen/id6758948095/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | — | Free |
| Size | 98 MB | 6 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Thought House](https://appshunter.io/developer/1835102141) | [Launch Round](https://appshunter.io/developer/1580265297) |

## What reviewers say

### Natality

[App page](https://appshunter.io/ios/app/natality-christian-journal/id6751435399)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Natality Lite Membership | $7.99 | per month |
| Monthly lite Membership | $7.99 | per month |
| Full Membership — Monthly | $9.99 | per month |
| Monthly Full Membership | $9.99 | per month |
| Annual lite Membership | $69.99 | per year |
| Full Membership — Annual | $89.99 | per year |
| Annual Full Membership | $89.99 | per year |


### KnowWhen

[App page](https://appshunter.io/ios/app/knowwhen/id6758948095)

This app offers simple, timely guidance for husbands based on their partner's cycle. It helps users understand when to offer support, listen, or give space, fostering better connection and reducing relationship tension.

**Highlights:** Daily simple guidance, Phase-based reminders, Private logging for patterns, Discreet data storage on device, Guidance on giving space, Guidance on offering support

**In-app purchases:** none


## Frequently asked questions

### Is Natality free?

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

### Is KnowWhen free?

KnowWhen costs $4.99, with no in-app purchases.

### Do Natality or KnowWhen have ads?

Neither Natality nor KnowWhen shows ads.

### Which is updated more often, Natality or KnowWhen?

Natality ships an update every 8 days, and KnowWhen every 3 months. Most recently, Natality was updated on October 12, 2026 and KnowWhen on October 24, 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.*