# Selene vs Diamond Period Tracker

The clearest difference is device support: Selene at 3 against Diamond Period Tracker's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Selene sells 1 one-off in-app purchase and Diamond Period Tracker sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Selene ships an update monthly, Diamond Period Tracker every 4 weeks. The most recent releases landed on May 28, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Selene | Diamond Period Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Size | 41 MB | 11 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AiofEffect LLC](https://appshunter.io/developer/1833105894) | [Elvin tansu Dogan](https://appshunter.io/developer/1893668578) |

## What reviewers say

### Selene

[App page](https://appshunter.io/ios/app/selene-period-tracker/id6757160714)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Selene Lifetime | $1.99 | one-time |


### Diamond Period Tracker

[App page](https://appshunter.io/ios/app/diamond-period-tracker/id6765629321)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $69.99 | per year |


## Frequently asked questions

### Is Selene free?

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

### Is Diamond Period Tracker free?

Diamond Period Tracker is free to download, with in-app purchases available.

### Do Selene or Diamond Period Tracker have ads?

Neither Selene nor Diamond Period Tracker shows ads.

### Which is updated more often, Selene or Diamond Period Tracker?

Selene ships an update monthly, and Diamond Period Tracker every 4 weeks. Most recently, Selene was updated on May 28, 2026 and Diamond Period Tracker on September 11, 2026.

---

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