Comparison

Changes Life Tracker vs Norwegian 4x4 Coach

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

Head to head
About

Changes Life Tracker

This app helps you understand your mood and behavior patterns by tracking your feelings and daily activities. It offers insights through charts, word clouds, and augmented reality, allowing you to identify what truly makes you happy and make positive life changes. Your data is securely stored and exportable.

Highlights
  • Daily mood logging
  • Hashtag support for entries
  • Apple Watch integration
  • Machine learning sentiment analysis
  • Augmented Reality infographics
  • Data export (JSON)
  • iCloud sync
Features
Read full description

It’s a struggle to know what really makes you happy. Our primitive brains are fundamentally ill-equipped to compute all our habits, achievements, aspirations and values. By keeping a log of how you feel while you feel it you can go beyond your inner dialogue to discern patterns of mood and behaviour. This app provides evidence-based and non-judgemental insight into what it is that really makes you happy. Mood tracking for busy people: Write your diary every day and say as much as you feel • Hashtag support to add structure or for quicker entries • Apple Watch support for the quickest entries • Dark and light mode support for maximum comfort • Randomised daily reminders • Scheduled reminders if you want to get into a journaling habit • Machine learning does some basic sentiment analysis to give you a gentle tail-wind when discerning your mood • Timeline and search features make it easy to explore your diary, with starred entries always visible for a "condensed narrative" • Sensitive entries can be marked private and will be blurred out and locked on your timeline so you nobody accidentally sees anything over your shoulder • Location can be automatically recorded with every entry • Useful tools to manage and organise your entries and hashtags Insights: As you add more data, more insights are unlocked • At a glance insights in words and charts help you quickly see your progress • Augmented Reality infographics let you deep-dive into large data sets without any pinching, swiping, tapping or scrolling - just move your phone around to explore • When you discover something interesting, take a picture to save to your Photos or share with others • Word clouds let you see what's been on your mind the most • Location map lets you see where you have been happiest • My Story insight lets you see all of your data at once with lanes of hashtags and a detailed day-by-day calendar. Take Action - make a change! • When you have enough data you can try making a change in your life • See how your story unfolds and whether you made your life better or worse You own your data • iCloud sync • Export JSON or your whole database • We don't do analytics without your permission and we tell you exactly what we collect This is the third evolution of my 'happiness app' concept since 2009 (or fifth, depending on how you count it). When I first started tracking my mood I didn't know what to expect. Now I have a pretty good idea of the biggest strengths of this mechanism and I've collected and bundled all of my insights in to this app, just for you. I hope you'll give it a try. Michael Forrest - Founder / Designer / Developer - Good To Hear UK

About

Norwegian 4x4 Coach

This app guides you through the Norwegian 4x4 interval workout using your real heart rate. It provides spoken cues and target heart rate ranges to ensure you train at the correct intensity without needing to constantly check your screen.

Highlights
  • Live heart-rate coaching
  • Spoken cues and phase guidance
  • Configurable workout parameters
  • Bluetooth heart-rate sensor compatibility
  • Session data export
  • Distraction-free design
Features
Read full description

Norwegian 4x4 Coach guides you through the proven Norwegian 4x4 interval workout using your real heart rate, so you train at the right intensity instead of guessing. The session is simple and effective: a warm-up, four 4-minute work intervals at a hard effort, three recovery periods in between, and a cool-down. As you move through each phase, the app announces what's coming and gives short, infrequent spoken cues to push harder, hold steady, or ease off, based on your live and predicted heart rate. No staring at the screen, no over-coaching. FEATURES - Live heart-rate coaching with brief, well-timed spoken cues - Clear phase guidance: warm-up, 4x work intervals, recoveries, cool-down - Per-phase target heart-rate ranges, set as a percent of your max (e.g. 85%–95%) - Anticipates drift and nudges you before you fall out of range - Fully configurable: max heart rate, target ranges, phase durations, and the number of intervals - Choose the coaching voice from the voices installed on your device - Put the cues in your own words: customize every effort prompt and phase announcement in Settings - Keeps coaching with the screen locked, and dips your music or podcast only while a cue is speaking - Works with Bluetooth heart-rate sensors, including Polar H10, Verity Sense, and OH1, and standard Bluetooth chest straps - Export a full session (heart rate over time, the phase and round, and target zones) to share with Messages, Mail, Files, or an AI assistant for analysis, as a self-documenting file or plain text - Optional nag mode: repeat a cue while you are still out of your target range (off by default) - Clean, distraction-free design PRIVACY Norwegian 4x4 Coach collects no data. Your heart rate is used only on your device, in real time, and is never stored off-device or transmitted. There is no tracking, no analytics, and no account. SAFETY Norwegian 4x4 Coach is a fitness tool, not a medical device, and does not provide medical advice. High-intensity exercise carries risk. Consult a physician before beginning any new exercise program, and stop if you feel unwell. Requires a Bluetooth heart-rate sensor.

Screenshots

Changes Life Tracker4 screens
Norwegian 4x4 Coach4 screens

Verdict

The call

The clearest difference is in-app purchases: Norwegian 4x4 Coach at none against Changes Life Tracker's 3. Norwegian 4x4 Coach also leads on update cadence (daily vs every 2 months). Changes Life Tracker's advantage is device support (3 vs 1) and ratings volume (3 vs 1). On price, rating 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. Changes Life Tracker sells 3 in-app purchases, starting at $3.99 per 3 months. Norwegian 4x4 Coach 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 Changes Life Tracker against 5.0 for Norwegian 4x4 Coach. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Changes Life Tracker ships an update every 2 months, Norwegian 4x4 Coach daily. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
Changes Life Tracker versus Norwegian 4x4 Coach: the parameters behind the verdict, then further details
ParameterChanges Life TrackerNorwegian 4x4 Coach
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews33.3% of reviews—
Number of ratings3 — better1
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size50 MB7 MB
Age rating4+4+
DeveloperGood To HearJames Weaver

In-app purchases

3 purchases

Changes Life Tracker

Subscriptions3
  • 3 Months Premium Updates$3.993 Months
  • 6 Months Premium Updates$4.996 Months
  • 1 Year Premium Updates$6.991 Year
None

Norwegian 4x4 Coach

No in-app purchases

Questions

Is Changes Life Tracker free?
Changes Life Tracker is free to download, with in-app purchases available.
Is Norwegian 4x4 Coach free?
Norwegian 4x4 Coach is free to download, with no in-app purchases.
Which has better reviews, Changes Life Tracker or Norwegian 4x4 Coach?
Changes Life Tracker and Norwegian 4x4 Coach are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do Changes Life Tracker or Norwegian 4x4 Coach have ads?
Neither Changes Life Tracker nor Norwegian 4x4 Coach shows ads.
Which is updated more often, Changes Life Tracker or Norwegian 4x4 Coach?
Changes Life Tracker ships an update every 2 months, and Norwegian 4x4 Coach daily. Most recently, Changes Life Tracker was updated on October 6, 2026 and Norwegian 4x4 Coach on October 25, 2026.

Other comparisons