# Tern vs Bleary (formerly Heady)

The clearest difference is in-app purchases: Tern at none against Bleary (formerly Heady)'s 2. Tern also leads on iOS requirement (11.0 vs 17.0). Bleary (formerly Heady)'s advantage is update cadence (every 10 days vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Bleary (formerly Heady) sells 2 in-app purchases, starting at $3.99 per month. Tern asks for nothing beyond the download.

Tern ships an update every 6 months, Bleary (formerly Heady) every 10 days. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Tern | Bleary (formerly Heady) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bleary-formerly-heady/id6785338448/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 10 days** |
| Monetization | **Free** | Subscription |
| Size | 18 MB | 21 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Albert Still](https://appshunter.io/developer/1479504919) | [Thomas Amar](https://appshunter.io/developer/1877393000) |

## What reviewers say

### Tern

[App page](https://appshunter.io/ios/app/tern/id1491440009)

This app automatically tracks your walking, cycling, or running commutes using AI and phone sensors. Monitor your progress, compete on CO2 leaderboards, and join challenges for rewards from sustainable brands. It's a free way to fight climate change with active transportation.

**Highlights:** Automatic commute detection (walk, cycle, run), AI-powered tracking, Real-time progress monitoring, CO2 leaderboards (workplace & city), National challenges with rewards, Sustainable brand partnerships

**Features:** macOS Compatibility

**In-app purchases:** none


### Bleary (formerly Heady)

[App page](https://appshunter.io/ios/app/bleary-formerly-heady/id6785338448)

Track migraines and understand their triggers, including barometric pressure and lifestyle factors. Log attacks quickly, view trends, and export reports for your doctor. Designed with a calming interface for sensitive users.

**Highlights:** Migraine logging in seconds, Barometric pressure correlation and forecast, Sleep, caffeine, and cycle tracking, Customizable symptom and medication logging, PDF report export for doctors, Dark mode and calming interface

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heady Mensual | $3.99 | per month |
| Heady Anual | $34.99 | per year |


## Frequently asked questions

### Is Tern free?

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

### Is Bleary (formerly Heady) free?

Bleary (formerly Heady) is free to download, with in-app purchases available.

### Do Tern or Bleary (formerly Heady) have ads?

Neither Tern nor Bleary (formerly Heady) shows ads.

### Which is updated more often, Tern or Bleary (formerly Heady)?

Tern ships an update every 6 months, and Bleary (formerly Heady) every 10 days. Most recently, Tern was updated on October 14, 2026 and Bleary (formerly Heady) on October 6, 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.*