Comparison

Tern vs Bleary (formerly Heady)

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Tern

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
Read full description

Like a step counter Tern automatically detects when you cycle, walk or run to work using AI and the sensors in your phone. Track your progress in real time and move up the CO2 leaderboards for your workplace and city. Visit the challenge section to join national challenges and win rewards from sustainable brands. Lets fight climate change with a bicycle and a pair of trainers, download and create your profile now, it's free!

About

Bleary (formerly Heady)

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
Read full description

What if you could get ahead of your next migraine instead of just enduring it? Bleary is your companion for understanding your migraines and no longer flying blind. Log an attack in under 10 seconds and discover which days carry the most risk by crossing your migraines with barometric pressure and other signals from your body. Bleary works with a Bleary Pro subscription (with a 7-day free trial): all features described below require an active subscription. Here's what Bleary does: GET AHEAD OF THE WEATHER Your iPhone has a barometer built in. Bleary uses it to correlate your migraines with barometric pressure, give you a 7-day pressure forecast, and alert you on high-risk days. The pressure–migraine correlation is the heart of the app. LOG IN SECONDS One big button: the attack started. Another tap: it's over. Afterwards, if you want, add intensity, pain location, symptoms, medication, and a note. Everything is optional — because nobody wants to fill out forms mid-attack. UNDERSTAND YOUR PATTERNS Bleary relates your attacks to pressure, sleep, caffeine, hydration, and your cycle. See your trends in clear cards, in the calm style of the Health app — no impossible charts. YOUR REPORT FOR THE DOCTOR Export a PDF report with your migraine history, symptoms, and medication for your next neurologist appointment. What you used to reconstruct from memory, you now bring in writing. DESIGNED FOR WHEN IT HURTS Dark mode by default, soft colors that don't hurt with photophobia, and a companion during the attack: guided breathing, a timer, and live pressure. Choose the color that calms you most. Why Bleary and not another app? Because you don't need to fill in a thousand fields or join any community. Your health data never travels to any server of ours: it stays on your iPhone and syncs privately across your devices with iCloud. Simple, private, and built to be there for you — even on your worst day. Disclaimer: Bleary is a self-awareness and tracking tool. It does not diagnose and does not replace the advice of a healthcare professional; always consult your doctor for diagnosis and treatment. — BLEARY PRO SUBSCRIPTION — Bleary Pro is an auto-renewable subscription. It includes a 7-day free trial. · Payment is charged to your Apple account when you confirm the purchase. The subscription renews automatically at the end of each period (and at the end of the free trial) unless you cancel at least 24 hours before. · You can manage or cancel your subscription at any time in your App Store account settings. Privacy Policy: https://thomascodes123.github.io/Bleary/privacidad.html Terms of Use (EULA): https://thomascodes123.github.io/Bleary/terminos.html

Screenshots

Tern4 screens
Bleary (formerly Heady)4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Tern versus Bleary (formerly Heady): the parameters behind the verdict, then further details
ParameterTernBleary (formerly Heady)
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 6 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPod — betteriPhone
Requires iOS11.0 — better17.0
Further details — not scored
Size18 MB21 MB
Age rating4+4+
DeveloperAlbert StillThomas Amar

Customer experience

Tern

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bleary (formerly Heady)

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Tern

No in-app purchases

2 purchases

Bleary (formerly Heady)

Subscriptions2
  • Heady Mensual7 Days trial$3.991 Month
  • Heady Anual7 Days trial$34.991 Year

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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