# Machine Learning Playground

> Machine Learning Playground (iPhone/iPad app by Thomas Crampton.)

- Source: https://appshunter.io/ios/app/machine-learning-playground/id1472888377 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Crampton](https://appshunter.io/developer/1472888376)
- Category: Education
- Price: $3.99
- Age rating: 4+
- Requires: iOS 16.1 · 5 MB
- Languages: English
- Released: 2019-08-02
- Data updated: 2026-05-17
- User reviews in markdown: https://appshunter.io/ios/app/machine-learning-playground/id1472888377/reviews.md

## What is Machine Learning Playground?

Machine Learning Playground allows you to experiment with neural network models. The application ships with four read-only datasets. Some datasets are designed for regression analysis while others are suited for classification.  The models themselves will consist of three layers: inputs, hidden and outputs. There is a set of hyper-parameters that you can adjust to gauge their effects on a model's accuracy. You can define a stopping condition for halting the model's training step via the number of epochs or the loss target value. You can also switch between two loss functions - Mean Squared Error and Cross-Entropy. Zoomable charts plot loss and accuracy across the epochs.

The app will also allow you to create and save custom datasets. You specify the number of inputs, hidden nodes and outputs along with the activation functions at the hidden and output layers. Tune your model built on your custom dataset using the hyper-parameters. The data files that you create are stored in the app's domain on the iPad. Those files will persist until you either delete them yourself using the delete feature on the Custom Datasets page, or you remove the app entirely from your iPad.


## Version history (last 5 releases)

### 4.1 — 2022-11-19

The app has been recompiled to run under iOS v16.1. The app layout was updated so that it displays properly across newer as well as older iPad generations.

### 4.0 — 2020-08-13

1) Added a new chart to show the accuracy of your models plotted against the epochs
2) Removed the numeric output loss data
3) Moved the descriptions of the built-in models to a dedicated page
4) Changed the output activation function of the Boston House Price dataset to Rectified Linear Unit
5) Fixed a bug that caused a duplicate entry in the model picker control when a custom dataset was edited

### 3.3 — 2020-03-30

Recompiled to iOS v3.4.

### 3.2 — 2019-11-13

1) Fixed a bug related to renaming an existing custom dataset after making changes. The new file name did not immediately appear in the My Datasets list or in the list of datasets in the home view.
2) Added some defensive coding when selecting a dataset in the home view. The app now checks for consistency between the number of inputs and outputs and the data itself. If there is a mismatch an error dialog is displayed and the model cannot be executed. This is an issue for custom datasets only.

### 3.1 — 2019-10-23

Fixed some UI issues that popped up with iOS 13.

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## More apps by Thomas Crampton

- [PCA Pro](https://appshunter.io/ios/app/pca-pro/id1493472656)

All apps by Thomas Crampton: https://appshunter.io/developer/1472888376

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*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 2026-05-17.*