# Period Tracker vs Otter Sleep

The clearest difference is review sentiment: Period Tracker at 100% against Otter Sleep's 62%. Period Tracker also leads on monetization model (free vs free with in-app purchases) and rating (5.0 vs 4.7). Otter Sleep's advantage is ads (none vs shown) and ratings volume (85 vs 4). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Period Tracker sells 1 in-app purchase, starting at $29.99 per year and Otter Sleep sells 10 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Period Tracker holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Otter Sleep has 85 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Period Tracker's written reviews are positive against 62% of Otter Sleep's.

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | Period Tracker | Otter Sleep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/period-tracker-ruby/id6746857902/reviews)** | [4.7 (85 ratings)](https://appshunter.io/ios/app/otter-sleep-sleep-tracker/id6755416816/reviews) |
| Number of ratings | 4 | **85** |
| Positive reviews | **100.0% of reviews** | 61.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 47 MB | 158 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Rafiki Apps](https://appshunter.io/developer/1684249563) | [Chongqing Cuyi Technology Co., Ltd](https://appshunter.io/developer/1657063984) |

## What reviewers say

### Period Tracker

[App page](https://appshunter.io/ios/app/period-tracker-ruby/id6746857902)

This app helps you track your menstrual cycle, predict ovulation, and log symptoms. It offers personalized insights and gentle reminders to help you understand your body better. Designed for simplicity and privacy, it's a comprehensive tool for managing your reproductive health.

**Highlights:** Menstrual cycle tracking, Ovulation prediction, Period and flow logging, Symptom and emotion tracking, Personalized insights, Gentle reminders

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruby Premium | $29.99 | per year |


### Otter Sleep

[App page](https://appshunter.io/ios/app/otter-sleep-sleep-tracker/id6755416816)

This app helps you sleep better by analyzing your sleep patterns and recording sounds like snoring and sleep talk. It features a cute companion named Nomi to make bedtime less lonely and offers sleep-inducing music and white noise to help you relax. Improve your sleep habits with personalized insights and a vitality development system.

**Highlights:** Sleep companion with virtual otter, Sleep-inducing music and white noise, Scientific sleep stage analysis, Sleep talk and snore recording, Vitality development system, Apple Health sync

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| weekly subscription | $2.99 | per 7 days |
| weekly subscription | $5.99 | per 7 days |
| weekly subscription | $7.99 | per 7 days |
| monthly subscription | $7.99 | per month |
| monthly subscription | $9.99 | per month |
| yearly subscription | $14.99 | per year |
| yearly subscription | $17.99 | per year |
| yearly subscription | $29.99 | per year |
| yearly subscription | $29.99 | per year |
| yearly subscription | $29.99 | per year |


## Frequently asked questions

### Is Period Tracker free?

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

### Is Otter Sleep free?

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

### Which has better reviews, Period Tracker or Otter Sleep?

Period Tracker is rated higher. Period Tracker averages 5.0 out of 5 from 4 ratings, while Otter Sleep averages 4.7 from 85 ratings.

### Do Period Tracker or Otter Sleep have ads?

Period Tracker shows ads; Otter Sleep does not.

### Which is updated more often, Period Tracker or Otter Sleep?

Period Tracker ships an update every 2 weeks, and Otter Sleep every 2 weeks. Most recently, Period Tracker was updated on October 30, 2026 and Otter Sleep on October 30, 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.*