Serious statistics.
No install, no cloud, no subscription.

TRTT opens your .sav data files, runs the analyses you know — frequencies, crosstabs, t tests, ANOVA, regression — and builds publication-ready charts. Everything computes on your device; your data never leaves it.

Launch the web app Download for iPhone & iPad

trtt.app — Data Editor

TRTT web app: the Data Editor showing a labelled .sav dataset in the browser

Pearson χ² 5.791 · df 4

200 cases · weighted

TRTT on iPad: crosstabs with chi-square tests

TRTT on iPhone: the Variable View with labels and missing values

Real output from the built-in sample — the same engine and the same numbers in your browser and on iPhone & iPad.

Full .sav / .zsav support

Open, edit and save the format used by IBM SPSS Statistics and PSPP — value labels, missing values, weights and long strings included. Import CSV and Excel too.

The analyses you expect

Descriptives, frequencies, crosstabs with chi-square, correlations, t tests, one-way ANOVA, linear regression, reliability, nonparametrics — with Select Cases, Split File and case weighting.

A real syntax window

Write and run syntax, or press Paste in any dialog to generate it — plus equivalent R and Python code.

Private by architecture

WebAssembly in the browser, native code on iOS. No accounts, no telemetry, no uploads — there is no server to send your data to.

TRTT for the web

Runs in any modern desktop browser. Open a .sav from disk, work, save — like a desktop app, minus the install.

Open trtt.app

TRTT for iPhone & iPad

The same engine, the same results, in your pocket. Open .sav files from Files or Mail, analyze on the go, share output as PDF.

Get it on the App Store

TRTT is an independent product. It is not affiliated with or endorsed by IBM. IBM and SPSS are trademarks of International Business Machines Corporation.