Comparison

Marbles CBT vs CBT Diary

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

Head to head
About

Marbles CBT

This app helps users learn and practice Cognitive Behavioral Therapy techniques to manage habits, thinking patterns, and emotions. It offers tools for thought challenging, fear exposure, and various diaries for tracking mood, gratitude, and self-monitoring. Additional features include relaxation exercises and educational lessons on CBT.

Highlights
  • Thought challenging exercises
  • Fear exposure practice
  • Self-monitoring diary
  • Slow breathing relaxation
  • Muscle relaxation techniques
  • Mood and gratitude diaries
  • CBT learning lessons
Features
Read full description

Marbles CBT is an easy-to-use app for learning and practicing tools from CBT therapy. Whether you have tried it or not, you can use it to change your habits and thinking patterns and feel better. Marbles features several tools, including: Thought challenging - negative feelings often arise from our thoughts about situations and events in life. Cognitive behavioural therapy teaches us to identify such thought patterns that are not logical, called "cognitive distortions." In Marbles, the process of challenging thoughts is structured: recording the thought, identifying distortions, challenging the thought, and creating an alternative thought. The tool and various distortions are also covered in short lessons. Overcoming fears (using exposures) - CBT is highly effective for dealing with specific fears such as: fear of heights, claustrophobia, fear of animals, social anxiety, etc. As part of the treatment, exposure exercises are used to gradually deal with the scary subject. The Marbles app enables you to create a central practice table and to keep track of every practice you do. Self-monitoring diary - one of the main CBT tools, it is a diary that allows you to examine the relationship between your thoughts, feelings, and behaviors in different situations. Through it, you learn how your thoughts and behaviors affect your emotions. Slow breathing - The practice of slow breathing is an easy and highly effective method for relaxing the body. For beginners and experienced practitioners alike. Muscle relaxation - a simple relaxation technique that relieves physical and mental stress, anxiety, and even pain. Marbles contains illustrated instructions for practicing relaxation at all levels. Mood diary - for recording changes in mood over time. In addition, you can choose accompanying emotions and add comments. In the insights screen, you can see the changes in mood over time. Gratitude diary - allows you to record things you're thankful for. Regularly noting your blessings, big and small, can improve your outlook, reduce stress, and help you appreciate life more fully. Additional features include: • Insights screen with mood graph, your most common emotions, and activity data. • Follow up on thoughts relating to future events (did what you expect really happen?). • A learning section with short lessons on CBT, app features, and usage tips. • Share all your content easily - you can attach your diaries and exercises in an email (convenient for therapists). Subscription All the main features of the app are completely free to use. We offer a premium subscription to keep the core tools of the app free. These include: additional diaries, insights, and relaxations. The premium subscription also allows us to spend more time and budget upgrading Marbles and adding new features. A subscription may differ in price by country. Payment will be deducted from a user's Apple App Store account at the time of purchase. Subscriptions will automatically renew 24 hours before they expire unless cancelled in advance. Disclaimer It is important to remember that Marbles CBT is not meant to replace professional mental health help, therapy, or counselling. If you have concerns about any aspect of your mental health, or someone else's mental health, it is always advisable to seek professional help.

About

CBT Diary

This app helps you understand your mind using Cognitive Behavioral Therapy principles. It guides you to identify negative thought patterns, challenge unhelpful beliefs, and develop healthier perspectives in a private space. Export logs to share with your therapist for more productive sessions.

Highlights
  • Structured thought records
  • Therapy log export
  • Complete on-device privacy
  • Daily reflection reminders
  • Intuitive design
  • Identify negative thought patterns
Read full description

CBT Diary: track thoughts, build clarity Transform how you understand your mind with CBT Diary, a thoughtful tool based on Cognitive Behavioral Therapy principles. Identify negative thought patterns, challenge unhelpful beliefs, and develop healthier perspectives -- all in a private, judgment-free space. Key Features: Structured Thought Records: capture situations, automatic thoughts, emotions, and balanced responses using proven CBT techniques. Therapy Support: Export detailed logs to share with your therapist for more focused, productive sessions. Complete Privacy: All data stays on your device—nothing is uploaded or shared without your permission Reminders: Gentle daily prompts to build a sustainable reflection practice Clean, Intuitive Design: Simple interface that gets out of your way Whether you're working with a therapist or practicing self-reflection, CBT Diary helps you recognize patterns, challenge distortions, and build mental resilience.

Screenshots

Marbles CBT4 screens
CBT Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: CBT Diary at none against Marbles CBT's 2. Marbles CBT's advantage is update cadence (every 2 months vs every 5 months) and iOS requirement (15.0 vs 26.0). On price, rating, ratings volume 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. Marbles CBT sells 2 in-app purchases, starting at $7.99 per month. CBT Diary 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 Marbles CBT against 5.0 for CBT Diary. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Marbles CBT ships an update every 2 months, CBT Diary every 5 months. The most recent releases landed on June 4, 2026 and June 1, 2026 respectively.

Scorecard4 real differences · 6 level
Marbles CBT versus CBT Diary: the parameters behind the verdict, then further details
ParameterMarbles CBTCBT Diary
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 2 months — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.0
Further details — not scored
Size35 MB2 MB
Age rating12+12+
DeveloperOmri SadehVictor Kravchenko

Customer experience

Marbles CBT

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

CBT Diary

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Marbles CBT

Subscriptions2
  • English14 Days trial$7.991 Month
  • English$79.991 Year
None

CBT Diary

No in-app purchases

Questions

Is Marbles CBT free?
Marbles CBT is free to download, with in-app purchases available.
Is CBT Diary free?
CBT Diary is free to download, with no in-app purchases.
Which has better reviews, Marbles CBT or CBT Diary?
Marbles CBT and CBT Diary are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Marbles CBT or CBT Diary have ads?
Neither Marbles CBT nor CBT Diary shows ads.
Which is updated more often, Marbles CBT or CBT Diary?
Marbles CBT ships an update every 2 months, and CBT Diary every 5 months. Most recently, Marbles CBT was updated on June 4, 2026 and CBT Diary on June 1, 2026.

Other comparisons