Comparison

Piston vs Digital Judge 2.0

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Piston

This app facilitates learning and knowledge transfer during training and performances through multi-camera video analysis. It allows for capturing, reviewing, and annotating video from up to 16 cameras simultaneously, with options for live streaming and data export.

Highlights
  • 4K multi-camera capture
  • Up to 16 cameras simultaneously
  • Real-time annotation and markup
  • Drawing tools for highlighting
  • Live streaming and AWS S3 upload
  • Live Opta data import
Read full description

Capture and accelerate learning moments during training and performances using a Piston Server. Piston is built for teaching using multi-camera vision to enhance the knowledge transfer process. Create a real impact at the point of best contact. • 4K VISION Piston captures vision from a wide variety of 4K network cameras and supports options for SDI and HDMI. Capture features include custom encoding options, single file and streaming file creation and synchronised multi-camera session capture. • Multi-Camera Piston systems are capable of capturing and reviewing up to 16 network cameras simultaneously. In-sync angle switching is a simple swipe. Clips from multiple angles can be cut and downloaded for offline review. Capture sessions can be scheduled ahead of time, so nothing is missed. • Multipeer MarkUp Shared markup and annotation data across all users during capture sessions in real time or post-event. Mark up button schemes are distributed from a central source, so mark up data capture is consistent. Supports XML and JSON data export. • Drawing Pause, draw and save. Simple to use drawing tools to highlight aspects of the vision. Save as images with the drawings for later viewing or sharing. • Streaming Upload Live streaming export and upload to AWS Simple Storage Service (S3). A cost-effective, reliable and easy way to stream. Supports custom export settings and angle selection. • Live Opta Import With a live data subscription, Opta's live data can be imported and synchronised in a capture session.

About

Digital Judge 2.0

Features
Read full description

Digital Judge 2.0 is the next iteration of judging via a mobile device for Men’s & Women’s Artistic Gymnastics. Not recommended to use in formal competition but very useful in the training environment or when you want to judge a routine, skill or combination and provide immediate feedback to the gymnast. Key Features - Quick start - Haptic feedback when deduction button pressed - Graphic representation of deductions - Record and replay video - Save video with graph of deductions - Upload video to judge from photo library Digital Judge offers an auto-renewing subscription-based on in-app purchase. Subscription name: Yearly Subscription Subscription cost: $1.99 (USD) Subscription duration: 1 Year Terms of Use: You can read your terms of use click on below link https://gymnasticsapps.wordpress.com/other/terms-of-service/ Auto-renewing subscription: You subscription will be renewed every year i.e. you will be charged every year after Free Trial period. – Payment will be charged to iTunes Account at confirmation of purchase – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase – You can read our privacy policy - https://gymnasticsapps.wordpress.com/other/privacy/ – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

Screenshots

Piston4 screens
Digital Judge 2.04 screens

Verdict

The call

The clearest difference is in-app purchases: Piston at none against Digital Judge 2.0's 2. Digital Judge 2.0's advantage is update cadence (daily vs monthly). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Digital Judge 2.0 sells 1 in-app purchase, starting at $1.99 per 7 days. Piston asks for nothing beyond the download.

UpkeepUpdate frequency

Piston ships an update monthly, Digital Judge 2.0 daily. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Piston versus Digital Judge 2.0: the parameters behind the verdict, then further details
ParameterPistonDigital Judge 2.0
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyMonthlyDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Mac, Apple TV — betteriPhone, iPad, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size113 MB7 MB
Age rating4+17+
DeveloperSuper Jump Pty LtdKeepingScoreOnline.com

In-app purchases

None

Piston

No in-app purchases

1 purchases

Digital Judge 2.0

Subscriptions1
  • Yearly access7 Days trial2 variants$1.997 Days

Questions

Is Piston free?
Piston is free to download, with no in-app purchases.
Is Digital Judge 2.0 free?
Digital Judge 2.0 is free to download, with in-app purchases available.
Do Piston or Digital Judge 2.0 have ads?
Neither Piston nor Digital Judge 2.0 shows ads.
Which is updated more often, Piston or Digital Judge 2.0?
Piston ships an update monthly, and Digital Judge 2.0 daily. Most recently, Piston was updated on October 11, 2026 and Digital Judge 2.0 on October 25, 2026.

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