Comparison

Muninn vs GridMix

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

Head to head
About

Muninn

This app automatically tracks your daily habits by syncing with your phone's Health data and photo library. It helps you build positive routines and break bad ones with customizable widgets and streak tracking.

Highlights
  • Automatic habit logging from Health and Photos
  • Home and Lock Screen widgets
  • Streak tracking for positive habits
  • Tracking habits to quit
  • Customizable habit scheduling
  • Rest day support for streaks
Features
Read full description

Muninn keeps today's habits on your Home Screen and Lock Screen, and checks them off by itself when Health or Photos shows they happened. Go for a run and it's already marked done. Each habit is a row of tally marks, one per day. Glance at a widget to see what's left today, tap to mark a habit done, and watch the streak grow. LET YOUR PHONE DO THE LOGGING Muninn reads Apple Health and your photo library to check habits off for you: • Steps, exercise minutes, active energy, stand hours, water, time in daylight and mindful minutes, with a daily goal you set • Sleep and bedtime, walking, running and cycling distance, toothbrushing and handwashing • Logging your weight • Workouts: any workout, or a run, walk, ride, swim, yoga or strength session, with an optional minimum length • A new photo or video, for a photo-a-day habit Access is read only. Muninn never changes your Health data or photo library, and never uploads them. Your habits stay on your iPhone. START FROM A GOAL Tell Muninn what you want to keep up, like moving more, a calmer mind or a photo a day, and pick from habits that show how they'll be checked off. Or name your own habit and check it off by hand. HABITS YOU WANT TO QUIT • Add something to stop, like No sugar or No alcohol • Every day counts by itself. One tap marks a slip, and one more takes it back • See your days without and your longest run, with an evening check-in HABITS THAT FIT YOUR WEEK • Every day, chosen weekdays, or a few times a week • Show a habit on widgets only in the morning, afternoon or evening • A reminder at the time you pick, only if the habit isn't done yet, with a Mark as done action • Streaks that count rest days as rest, not failure • Skip today or pause a habit, and your streak waits for you • A page for each habit with its streak, completion rates and every day of the past year • Start a habit from an earlier date, and mark a past day you forgot • Tap a habit's marks to check off today, or touch and hold for more • Shortcuts, and export and import as a file WIDGETS • Home Screen widgets in small, medium and large • Lock Screen widgets in every size • Choose which habits each widget shows • A Days without widget for a habit you're quitting • Tap a habit in a Home Screen widget to check it off without opening the app • Hide habits from your Home Screen widgets once they're done FREE AND PRO Muninn is free for up to 3 habits, with the small Home Screen widget, notifications, checking off by hand, and one habit that checks itself off from Health or Photos. Muninn Pro adds unlimited habits, every Home Screen and Lock Screen widget, and automatic check-off for all your habits. Coming from INTR? Your reminders, history and widgets come with you, and everything you already had stays unlocked. No account, no ads, no tracking. MUNINN PRO Muninn Pro is available as an auto-renewing subscription or a one-time purchase. Plans and prices are shown in the app. Subscriptions renew automatically unless you cancel at least 24 hours before the end of the current period. Payment is charged to your Apple Account, and you can manage or cancel your subscription in your App Store account settings. If a plan includes a free trial, any unused part of it ends when you buy a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.norseventures.co/intr/privacy-policy/

About

GridMix

This app visualizes your region's live CO₂ emissions and forecasts them for the next 24 hours. It helps you identify the cleanest times to use electricity, like charging an EV or running appliances, to reduce your carbon footprint.

Highlights
  • Live CO₂ emissions visualization
  • 24-hour emissions forecast
  • Marginal Operating Emissions Rate (MOER)
  • Fossil fuel percentage on grid
  • Location-aware coverage
  • Near real-time updates
Features
Read full description

Electricity isn’t equally clean every hour. This app shows your region’s live CO₂ and a 24-hour forecast so you can act when energy is cleanest. About to charge your EV or start the dryer? If the curve drops in an hour, wait and cut your emissions—no guesswork. Simple timeline, clear numbers, smarter choices. Know when your electricity is cleanest. Open the app and the gradient color tells the story in a glance: lighter green means cleaner power right now; darker tones mean it’s dirtier. No menus. No jargon. Just a quick read on your impact. For more detail, see the exact numbers: • MOER — the Marginal Operating Emissions Rate: the extra CO₂ emitted if one more megawatt-hour is used right now. Shown in lbs CO₂/MWh, it’s the most actionable way to time charging and appliances. • Fossil % — the share of your grid currently powered by fossil fuels. Plan smarter with a 24-hour forecast for your region. If emissions drop in an hour or two, you’ll see it, so you can delay EV charging, laundry, or heating/cooling to a cleaner window. Built on trusted public data. The app combines reliable datasets (U.S. EIA grid operations and EPA emissions) with robust statistical modeling. Data are refreshed throughout the day, so shifts in demand are captured in near real-time. Location-aware, nationwide coverage. We use your current location to map you to your Balancing Authority (BA) so you’re seeing the electricity you actually consume. The majority of major U.S. BAs are supported. Why you’ll love it • At-a-glance color gradient for “clean vs. dirty” right now • Current MOER (lbs CO₂/MWh) and Fossil % on your grid • 24-hour emissions forecast to pick the greenest hour • Near real-time updates as conditions change • Clean, minimal design—open, check, decide What’s next: widgets, notifications when low-emission hours are coming, a watchOS app, and more. Make timing your climate superpower. See when your energy is cleanest and act on it.

Screenshots

Muninn4 screens
GridMix3 screens

Verdict

The call

The clearest difference is in-app purchases: GridMix at none against Muninn's 3. GridMix also leads on ratings volume (3 vs 1) and iOS requirement (16.2 vs 26.0). On price, rating, update cadence and ads 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. Muninn sells 3 in-app purchases, starting at $2.99 per month. GridMix asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Muninn against 5.0 for GridMix. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

UpkeepUpdate frequency

Muninn ships an update every 5 days, GridMix every 3 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 5 level
Muninn versus GridMix: the parameters behind the verdict, then further details
ParameterMuninnGridMix
PriceFreeFree
Rating5.0 (1 ratings)5.0 (3 ratings)
Number of ratings13 — better
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.016.2 — better
Further details — not scored
Size17 MB97 MB
Age rating4+4+
DeveloperNorse Ventures LLCJohn Chaykowsky

Customer experience

Muninn

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

GridMix

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Muninn

Subscriptions2
  • Muninn Pro Monthly$2.991 Month
  • Muninn Pro Yearly7 Days trial$19.991 Year
One-time1
  • Muninn Pro Lifetime$39.99
None

GridMix

No in-app purchases

Questions

Is Muninn free?
Muninn is free to download, with in-app purchases available.
Is GridMix free?
GridMix is free to download, with no in-app purchases.
Which has better reviews, Muninn or GridMix?
Muninn and GridMix are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.
Do Muninn or GridMix have ads?
Neither Muninn nor GridMix shows ads.
Which is updated more often, Muninn or GridMix?
Muninn ships an update every 5 days, and GridMix every 3 days. Most recently, Muninn was updated on November 3, 2026 and GridMix on November 5, 2026.

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