# Period vs DimmiDai

The clearest difference is in-app purchases: Period at none against DimmiDai's 2. Period also leads on iOS requirement (13.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DimmiDai sells 2 in-app purchases, starting at $8.99 per month. Period asks for nothing beyond the download.

Period ships an update monthly, DimmiDai every 2 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Period | DimmiDai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (2.8K ratings)](https://appshunter.io/ios/app/period-tracker/id6480586681/reviews)** | — |
| Number of ratings | **2.8K** | — |
| Positive reviews | 53.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 56 MB | 43 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [SPD Development Company Ltd](https://appshunter.io/developer/976408511) | [FABIO GLIELMI](https://appshunter.io/developer/6800488437) |

## What reviewers say

### Period

[App page](https://appshunter.io/ios/app/period-tracker/id6480586681)

Track your menstrual cycle, log period dates, ovulation test results, and symptoms. Gain insights into fertility probability based on your cycle length. This app helps predict periods and monitor cycles.

**Highlights:** Menstrual cycle tracking, Period logging, Ovulation test logging, Symptom tracking, Fertility probability insights, Cycle length comparison

**In-app purchases:** none

**What reviewers like**

- 👍 Accurate tracking
- 🚀 Easy to use
- 💡 Helpful for fertility tracking

**What reviewers complain about**

- 🐛 Notifications not working as expected
- 🐛 Data loss after updates
- 🐛 Broken links in the app
- 💡 No option to log basal body temperature

**Reported bugs**

- Dates and data getting changed after updates
- Calendar not populating after updates
- Whole calendar getting erased after updates

**Requested features**

- Add option to log basal body temperature
- Improve notification customization


### DimmiDai

[App page](https://appshunter.io/ios/app/dimmidai/id6800488435)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DimmiDai Mensile | $8.99 | per month |
| DimmiDai Annuale | $59.99 | per year |


## Frequently asked questions

### Is Period free?

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

### Is DimmiDai free?

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

### Do Period or DimmiDai have ads?

Neither Period nor DimmiDai shows ads.

### Which is updated more often, Period or DimmiDai?

Period ships an update monthly, and DimmiDai every 2 weeks. Most recently, Period was updated on October 24, 2026 and DimmiDai on October 20, 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.*