Polygraf vs Robot Stats
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polygraf
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ABOUT POLYGRAF Polygraf system brings universal access to lectures, presentations, business meetings and any other kind of events. Even though the main target group are hearing and visually impaired users, the application can provide in the same time helpful features for all audience. Polygraf enables: 1. to display real-time transcript of speech (speech-to-text reporting, CART service) in user’s hand continuously; 2. to display content of presentation screen in user’s hand with option to attach the transcript of speech as subtitles (closed captions). HOW IT WORKS A professional speech-to-text reporter (CART writer) transcribes real-time spoken word into text using Polygraf Writer application which is another part of Polygraf system (see www.teiresias.muni.cz/polygraf) and the text is broadcasted via a wireless network. In the same time, content of presentation screen provided by a presenter’s computer is captured and broadcasted via the same wireless network as well. This mobile app can receive and display both resources. Note: Establishing both services in parallel is not a requirement; internet connection is not required. WHAT ARE BENEFITS FOR USERS 1. Users can follow the speech-to-text transcript on a mobile device continuously - it allows rather more comfortable and independent use of the speech-to-text service than reading the text from transcriber’s computer or from a central screen in the front; more than one mobile devices can be connected, so more users can follow the transcript in the same time. Features: - view options of the text (font family, size and color, line-spacing) - scroll the text back to display earlier portions of it - basic two-way communication (users can send text messages to speech-to-text reporter) 2. Users can view the content of presentation screen in hand on a mobile device - it brings the legibility of presentations when there is any difficulty to read it from a distance (user’s visual impairment, small size of the presentation, bad light conditions etc.). Features: - view options of the presentation (zoom, color-inverting, B/W scheme) - image refresh rate - option to attach the transcript of speech as subtitles (closed captions) For further information on other parts of Polygraf system, see www.teiresias.muni.cz/polygraf. Support Centre for Students with Special Needs Masaryk University
Robot Stats
This app assists VEX Robotics teams in scouting, tracking performance, and preparing for competitions. It provides tools to analyze rankings, predict match outcomes, and generate detailed event reports using real competition data.
- Advanced team rankings
- Event report generation
- Match outcome prediction
- Integrated scouting lists
- Event and match analysis
- Region and team insights
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Look up VEX Robotics teams by number, compare team statistics and rankings, follow events and skills standings, and prepare for competitions with scouting and match-prediction tools. Features Rankings and Team Insights View event rankings, season rankings, skills rankings, top scores, awards, and TrueSkill-based ratings for V5RC and VIQRC teams. Match Predictor and Event Analysis Compare alliances, estimate matchups, review participating teams, explore divisions, and keep match schedules and results close on competition day. Scouting and Watchlists Follow teams, save scouting context, and keep important teams and events easy to return to. Event Reports Generate event reports from rankings, matches, skills, awards, statistics, and your own notes. Team Hub Run one team with checklists, packing lists, match prep, announcements, event notes, practice plans, deadline tracking, logbook entries, receipt tracking, permission-slip forms, Notebook Prep exports, and private Team Hub alerts. Coach Cockpit See connected coach teams, jump into each Team Hub, review event-day notes, open tasks, deadlines, permission-slip gaps, expenses, announcements, and recent team updates from one coach view. Notifications Use timed Team Hails or persistent Team Updates with the notifications inbox and native push delivery. Pinned Team Announcements remain passive Hub context. Robot Tools Use quick tools for gear ratios, drive speed, intake grip, rotating arm output, and V5RC or VIQRC match timing. Coach Pro Optional Coach Pro is built for coaches and mentors managing more than one team. It unlocks active management for additional attached teams beyond your free Home Team, expanded follow capacity, and personal coach workflow upgrades in the native app. Robot Stats is an independent app for the VEX Robotics community. It is not affiliated with or endorsed by VEX Robotics, RECF, or Innovation First International. Privacy Policy: https://robotstatistics.com/privacy Standard Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Polygraf at none against Robot Stats's 2. Polygraf also leads on iOS requirement (9.0 vs 16.4). Robot Stats's advantage is update cadence (every 9 days vs every 6 months). On price, ads and device support 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
Both are free to download. Robot Stats sells 2 in-app purchases, starting at $12.99 per month. Polygraf asks for nothing beyond the download.
Polygraf ships an update every 6 months, Robot Stats every 9 days. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.
| Parameter | Polygraf | Robot Stats |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (9 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 9 — better |
| Update frequency | Every 6 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 40 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Masaryk University | Lucian Badea |
In-app purchases
Polygraf
No in-app purchases
Robot Stats
- Coach Pro Monthly$12.991 Month
- Coach Pro Yearly$119.001 Year









