Polygraf vs PicusGO
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
PicusGO
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Become the Digital Ranger of your neighborhood. Every tree around you has a story. Point your camera, scan it, and PicusGO recognizes the species and puts it on a living map. Protect it and you become its guardian. Craft a collectible card from your tree and build your own green collection. But it goes beyond trees. Report illegal dumping, dangerous trees and ragweed. Plant new ones. Every action is a real mission on the map of your town, and real data in a growing environmental database. Start in your street and climb. Rise on the leaderboards of your neighborhood, your city and your country, all the way to the world. Let the whole community see that you are ready to protect nature. WHAT YOU CAN DO - Scan and map real trees with your camera - Protect trees and craft collectible cards - Report litter, hazardous trees and ragweed - Plant trees and grow your impact - Earn EIT eco-tokens as you explore - Climb local and global leaderboards - Vote for the Tree of the Day - Track your CO2, species and progress Out there, real trees are waiting and the community is already on the map. Your neighborhood is still missing its ranger. Join PicusGO and put your first tree on the map.
Screenshots
Verdict
The clearest difference is update cadence: PicusGO at every 3 weeks against Polygraf's every 6 months. Polygraf's advantage is iOS requirement (9.0 vs 15.1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Polygraf ships an update every 6 months, PicusGO every 3 weeks. The most recent releases landed on October 2, 2026 and September 18, 2026 respectively.
| Parameter | Polygraf | PicusGO |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 40 MB | 151 MB |
| Age rating | 4+ | 4+ |
| Developer | Masaryk University | Ivan Zuna |
In-app purchases
Polygraf
No in-app purchases
PicusGO
No in-app purchases









