# Shiftrest vs Iris

The clearest difference is ads: Shiftrest at none against Iris's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Shiftrest sells 3 in-app purchases, starting at $1.99 per 7 days and Iris sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Shiftrest ships an update every 2 weeks, Iris weekly. The most recent releases landed on August 25, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | Shiftrest | Iris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/iris-period-and-cycle-tracker/id6761134901/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 9 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [EMRE KEP](https://appshunter.io/developer/1881732853) | [Arbaz Siddiqui](https://appshunter.io/developer/1887947140) |

## What reviewers say

### Shiftrest

[App page](https://appshunter.io/ios/app/shiftrest-shift-sleep-planner/id6760971127)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Yearly | $24.99 | per year |


### Iris

[App page](https://appshunter.io/ios/app/iris-period-and-cycle-tracker/id6761134901)

This app offers comprehensive period and cycle tracking with advanced features like irregular cycle detection and personal insight generation. It prioritizes user privacy by keeping all data on the device, avoiding data sharing with advertisers. It also syncs with Apple Health and includes educational content on hormones.

**Highlights:** Period and cycle prediction, Irregular cycle tracking, Personalized insights and pattern detection, LH strip and BBT logging, Apple Health synchronization, Contraceptive and postpartum modes, Symptom and mood tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Shiftrest free?

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

### Is Iris free?

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

### Do Shiftrest or Iris have ads?

Iris shows ads; Shiftrest does not.

### Which is updated more often, Shiftrest or Iris?

Shiftrest ships an update every 2 weeks, and Iris weekly. Most recently, Shiftrest was updated on August 25, 2026 and Iris on August 19, 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.*