# Pebbly Nudge — Mental health guide & journal > AI-powered mental wellness companion with journaling and CBT-based chatbot. (iPhone/iPad app by Hock Boon Steven Ong.) - Source: https://appshunter.io/ios/app/pebbly-nudge/id6737975802 (this page in markdown: same URL + `.md`) - Developer: [Hock Boon Steven Ong](https://appshunter.io/developer/1778641804) - Category: Health & Fitness - Price: Free - Age rating: 17+ - Requires: iOS 15.6 · 40 MB - Languages: English - Released: 2025-02-27 - Data updated: 2026-06-25 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/pebbly-nudge/id6737975802/reviews.md ## What is Pebbly Nudge? Inspired by self-help books, CBT therapy, and habit-building techniques, Pebbly Nudge App ("Nudge) was designed using the creator’s personal journey through loneliness and depression during COVID. Nudge aims to be a well-being companion, seamlessly blending mindfulness, productivity, and self-reflection into a beautifully intuitive app. The App integrates an AI-powered chatbot, journaling, guided breathing and to-do lists to support mental wellness. Nudge strives to make self-care accessible to those who may not have the means to afford professional or medical treatment, offering an empowering alternative for mental well-being. So begin your journey to improved mental resilience—one insightful entry at a time! Now for the AI geeky deep dive: A key feature of our platform is an AI-powered chatbot, meticulously trained on 108 peer-reviewed Cognitive Behavioral Therapy (CBT) research articles. Leveraging the creator's expertise in data engineering and model building, the chatbot was developed using Natural Language Processing (NLP) techniques to ensure contextually relevant and scientifically grounded responses. The chatbot was trained on 108 high-quality CBT research articles, which underwent preprocessing techniques such as text tokenization, stemming, and lemmatization to standardize language. Stop words, punctuation, and metadata were filtered out to refine the training dataset, improving model efficiency. The text corpus was converted into numerical representations using Word2Vec, TF-IDF, and BERT embeddings to capture semantic meaning and contextual relationships. Sentence similarity models were implemented to accurately match user queries to the most relevant research-backed responses. Various Transformer-based architectures (e.g., BERT, RoBERTa) and traditional machine learning classifiers (e.g., Random Forest, SVM, Logistic Regression) were tested to optimize accuracy (It reached an accuracy of 97.6%!). The model was fine-tuned using supervised learning on labeled datasets to enhance response precision. A human-in-the-loop validation process was implemented, where subject matter experts reviewed and approved chatbot responses to ensure adherence to CBT principles. The chatbot integrates user feedback loops and reinforcement learning to continuously refine its accuracy and relevance. The chatbot operates on a retrieval-based response generation mechanism, ensuring scientifically validated responses rather than generating freeform text. In summary: With a visually calming interface, gamified progress tracking, and AI-driven insights, Nudge redefines self-care with a highly personalized experience. More than just an app, Nudge is a movement toward accessible digital well-being. By blending AI-driven machine learning with psychological expertise, Nudge ensures that individuals worldwide receive inclusive, credible, and tailored mental health support—without barriers. Medical Disclaimer: This app does not provide medical diagnoses or treatment. It is intended for informational purposes only. Please consult a qualified healthcare professional before making any medical decisions. ## Key features - AI-powered CBT chatbot - Guided journaling - Mindfulness exercises - To-do list integration - Gamified progress tracking - Personalized self-care ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/pebbly-nudge/id6737975802/reviews.md ### 5/5 — Nice interface *2025-04-15, version 1.2* I love the cat. Please create more apps! ### 5/5 — Cute cat! *2025-04-15, version 1.2* Love that it’s free. The advice from the CBT documents make sense. Thank you for this! ## Frequently asked questions about Pebbly Nudge ### What is Pebbly Nudge? Pebbly Nudge is a mental wellness companion app designed to support self-care. It integrates an AI-powered chatbot trained on Cognitive Behavioral Therapy (CBT) research, journaling features, guided breathing exercises, and to-do lists. ### How does the AI chatbot in Pebbly Nudge work? The AI chatbot in Pebbly Nudge was trained on 108 peer-reviewed CBT research articles using Natural Language Processing (NLP) techniques. It achieved an accuracy of 97.6% in providing scientifically grounded responses. ### Is Pebbly Nudge free to use? Yes, Pebbly Nudge is available for free. The app is designed to make mental well-being support accessible without financial barriers. ### What devices is Pebbly Nudge available on? Pebbly Nudge is currently supported on iPhone and iPod devices. ### What is the age rating for Pebbly Nudge? Pebbly Nudge has an age rating of 17+, indicating it is intended for mature users. ### How often is Pebbly Nudge updated? The app was last updated on March 4, 2025, with version 1.2. This suggests a relatively recent update cycle. ### Does Pebbly Nudge offer offline functionality? The provided data does not specify whether Pebbly Nudge offers offline functionality for its features like the AI chatbot or journaling. ### Does Pebbly Nudge have ads? No, Pebbly Nudge does not contain advertisements. The app is free and does not display ads to users. ## Version history (last 3 releases) ### 1.2 — 2025-03-04 Improvements - Version 1.1 introduces an animated introduction screen, enhancing the transition between the login and home pages for a smoother user experience. Version 1.2 removed the task examples in the To Do list. ### 1.1 — 2025-02-28 Improvements - Version 1.1 introduces an animated introduction screen, enhancing the transition between the login and home pages for a smoother user experience. ### 1.0 — 2025-02-27 No release notes. ## Apps similar to Pebbly Nudge | App | Rating | Price | Category | | --- | --- | --- | --- | | [Mental Health - Self Care](https://appshunter.io/ios/app/mental-health-self-care/id6736974156) | — | Free | Health & Fitness | | [Gently: AI Self Care Journal](https://appshunter.io/ios/app/gently-ai-self-care-journal/id6752495168) | — | Free | Health & Fitness | | [DeepLog - Grow by Journaling](https://appshunter.io/ios/app/deeplog-grow-by-journaling/id6751752636) | — | Free | Health & Fitness | | [FitBot AI-Powered Fitness Chat](https://appshunter.io/ios/app/fitbot-ai-powered-fitness-chat/id6469784881) | 4.0 (4) | Free | Health & Fitness | | [MotyMate: Self Care Pets](https://appshunter.io/ios/app/motymate-self-care-pets/id6448665289) | 4.8 (20) | Free | Health & Fitness | | [Haraka Fitness](https://appshunter.io/ios/app/haraka-fitness/id1582978509) | — | Free | Health & Fitness | ## More apps by Hock Boon Steven Ong - [Pebbly Tennis](https://appshunter.io/ios/app/pebbly-tennis/id6757379847) All apps by Hock Boon Steven Ong: https://appshunter.io/developer/1778641804 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*