# BillingsAppTM vs iNatural

The clearest difference is in-app purchases: iNatural at none against BillingsAppTM's 4. BillingsAppTM's advantage is update cadence (fortnightly vs every 17 months) and device support. On price and iOS requirement there is nothing between them.

Both are free to download. BillingsAppTM sells 4 in-app purchases, starting at $9.99 per year. iNatural asks for nothing beyond the download.

BillingsAppTM ships an update fortnightly, iNatural every 17 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | BillingsAppTM | iNatural |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (18 ratings)](https://appshunter.io/ios/app/billingsapptm/id1435246315/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 34.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Fortnightly** | Every 17 months |
| Monetization | Freemium | — |
| Size | 11 MB | 48 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 12+ |
| Developer | [Applied Programming LLC](https://appshunter.io/developer/1435246314) | [Argo Soluções tecnológicas LTDA](https://appshunter.io/developer/1545741990) |

## What reviewers say

### BillingsAppTM

[App page](https://appshunter.io/ios/app/billingsapptm/id1435246315)

Track your fertility using the Billings Ovulation Method® with daily entries and chart sharing. Access premium features like direct teacher contact, chart printing, and custom color palettes through a subscription.

**Highlights:** Daily entry registration, Spouse and device linking, Share chart with teacher, Save charts securely, Offline registration, Direct teacher questions, Print and email charts

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Billings App Premium | $9.99 | per year |
| Grafica Billings PREMIUM | $2.99 | one-time |
| Billings PREMIUM 1 Year | $9.99 | one-time |
| Billings PREMIUM 5 Years | $24.99 | one-time |


### iNatural

[App page](https://appshunter.io/ios/app/inatural/id6479702377)

**In-app purchases:** none


## Frequently asked questions

### Is BillingsAppTM free?

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

### Is iNatural free?

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

### Which is updated more often, BillingsAppTM or iNatural?

BillingsAppTM ships an update fortnightly, and iNatural every 17 months. Most recently, BillingsAppTM was updated on November 2, 2026 and iNatural 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.*