# Era vs Flow

The clearest difference is in-app purchases: Flow at none against Era's 3. Flow also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 6 weeks). Era's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price there is nothing between them.

Both are free to download. Era sells 3 in-app purchases, starting at $0.99 per month. Flow asks for nothing beyond the download.

Era ships an update every 6 weeks, Flow every 3 weeks. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Era | Flow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 105 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Sandip Kalola](https://appshunter.io/developer/1681710210) | [拥军 刘](https://appshunter.io/developer/1896777340) |

## What reviewers say

### Era

[App page](https://appshunter.io/ios/app/era-period-ovulation-tracker/id6746156978)

**Features:** Apple Wallet

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly plan | $0.99 | per month |
| premium yearly | $5.99 | per year |
| Era Pro - Lifetime Access | $4.99 | one-time |


### Flow

[App page](https://appshunter.io/ios/app/flow-period-tracker/id6791552767)

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

**In-app purchases:** none


## Frequently asked questions

### Is Era free?

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

### Is Flow free?

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

### Do Era or Flow have ads?

Era shows ads; Flow does not.

### Which is updated more often, Era or Flow?

Era ships an update every 6 weeks, and Flow every 3 weeks. Most recently, Era was updated on October 11, 2026 and Flow on October 24, 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.*