TRTT: Statistics & .sav Data
Offline statistical analysis
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Every analysis, chart and syntax command — free, on iPhone and iPad. No cloud, no account, your data never leaves the device. TRTT Pro unlocks datasets of any size.
TRTT is a complete statistical analysis tool that runs entirely on your device. Open, edit and save .sav and .zsav data files (the format used by IBM SPSS Statistics), import CSV and Excel workbooks, run the analyses you know, and share publication-ready output.
FREE — WITH EVERY FEATURE
Every analysis, every chart, the data editor and the syntax editor are free to use with datasets of up to 100 cases. Nothing is held back behind a feature list. Open a larger file and TRTT offers you a choice: load its first 100 cases and carry on for free, or unlock full dataset size.
TRTT PRO (IN-APP PURCHASE)
TRTT Pro is an optional in-app purchase and it unlocks one thing: dataset size. With it you work on files of any length, from a 500-case survey to a full register extract. Choose a weekly or a monthly subscription, or buy the lifetime unlock once and keep it (lifetime includes Family Sharing). Everything else is already in the free version, and stays there.
ANALYSES
Frequencies, Descriptives, Explore, Means, Crosstabs with chi-square, Ratio Statistics, correlations, t-tests, One-Way ANOVA and Univariate GLM, linear and ordinal regression, factor analysis, K-Means, hierarchical and TwoStep clustering, discriminant analysis, Nearest Neighbor classification and nonparametric tests — with weighted data, Select Cases and Split File, exactly as in desktop statistics packages.
CHARTS
Chart Builder with bar, line, pie, histogram, scatter, boxplot, error-bar and high-low charts, plus confidence intervals on bars and lines.
DATA MANAGEMENT
Data View and Variable View with value labels, missing values, variable types and formats. Compute, Recode, Rank Cases, Count Values, Autorecode and more — every transformation from the dialogs can also be pasted as authentic syntax.
SYNTAX
A real syntax editor: write and run SPSS-style commands, or use Paste in any dialog to generate the equivalent SPSS, R or Python code.
OUTPUT YOU CAN HAND IN
Tables and charts you can export as PDF, or as a native .spv viewer file.
YOUR DATA STAYS YOURS
100% offline. No account, no cloud, no tracking — your data files never leave your device.
Compatible with .sav/.zsav files created by IBM SPSS Statistics, PSPP and other statistical software. TRTT is an independent product and is not affiliated with or endorsed by IBM.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://trtt.app/privacy.html
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Plus, in 1.2.1:
- Crosstabs: choose cell contents — percentages without counts, expected counts and residuals
- Data View: alternating row shading, and whole numbers now display without trailing ".00"
- The classic icon set is now the default
- More resilient startup
TRTT is now free to download — with every feature included.
A NEW WAY TO GET TRTT
The whole app — all analyses, all charts, the data editor and the syntax editor — is now free for datasets of up to 100 cases. Open a bigger file and TRTT offers to load its first 100 cases, or to unlock full dataset size with TRTT Pro: weekly, monthly, or a one-time lifetime unlock. The free version is permanent, not a trial, and it is not going to shrink.
ALREADY BOUGHT TRTT? THANK YOU.
You keep everything you paid for, forever. Your app stays fully unlocked on every dataset — no subscription, nothing to buy again.
NEW ANALYSES
- Univariate GLM with estimated marginal means
- Ordinal regression
- Discriminant analysis
- Hierarchical clustering with dendrograms, K-Means and TwoStep clustering
- Nearest Neighbor classification
- Factor analysis and stepwise linear regression
- Ratio Statistics, now also broken down by a grouping variable
- Explore: all five percentile methods
- Frequencies: a full statistics table
NEW CHARTS
Chart Builder gains boxplots, error bars, high-low charts, and confidence intervals on bar and line charts.
NEW EXPORT
Save your output as a native .spv viewer file, charts included — or as PDF, as before.
The developer, Rafal Rybnik, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Rafal Rybnik
- Size
- 15.6 MB
- Category
- Business
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full Version 249,00 kr
- TRTT Pro — Monthly 89,00 kr
- TRTT Pro — Weekly 49,00 kr
- Copyright
- © Rafał Rybnik

