# Sulu vs TempCurve BBT Chart

The clearest difference is in-app purchases: TempCurve BBT Chart at none against Sulu's 2. Sulu's advantage is update cadence (every 9 days vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Sulu sells 2 in-app purchases, starting at $4.99 per month. TempCurve BBT Chart asks for nothing beyond the download.

Sulu ships an update every 9 days, TempCurve BBT Chart monthly. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Sulu | TempCurve BBT Chart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Size | 57 MB | 4 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Pow Solutions Pty Ltd](https://appshunter.io/developer/1885075826) | [拥军 刘](https://appshunter.io/developer/1896777340) |

## What reviewers say

### Sulu

[App page](https://appshunter.io/ios/app/sulu-perimenopause-tracker/id6760571470)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sulu Premium | $4.99 | per month |
| Sulu Premium | $44.99 | per year |


### TempCurve BBT Chart

[App page](https://appshunter.io/ios/app/tempcurve-bbt-chart/id6776111769)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sulu free?

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

### Is TempCurve BBT Chart free?

TempCurve BBT Chart is free to download, with no in-app purchases.

### Do Sulu or TempCurve BBT Chart have ads?

Neither Sulu nor TempCurve BBT Chart shows ads.

### Which is updated more often, Sulu or TempCurve BBT Chart?

Sulu ships an update every 9 days, and TempCurve BBT Chart monthly. Most recently, Sulu was updated on October 31, 2026 and TempCurve BBT Chart on October 28, 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.*