Comparison

Chronocurl vs Onform

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

Head to head
About

Chronocurl

This app provides a laser stopwatch system to help curling players analyze and improve their rock delivery. It quantifies linear speed, rotation, and direction, offering detailed feedback for enhanced consistency and performance.

Highlights
  • Laser stopwatch system
  • Quantifies linear speed
  • Measures rotation speed
  • Analyzes delivery direction
  • Speed data in multiple units
  • Hog line speed conversion
  • Between shot timer
Features
Read full description

Chronocurl is a laser stopwatch system useful to calculate relevant information for curling players. The curling delivery is a complex process. In order to progress, it is very important to get accurate feedback in order to quantify the diverse parameter composing the delivery. Three main parameter define the trajectory of a curling stone: the direction, the rotation speed and the linear speed of the rock. Chronocurl quantifies the linear speed of the curling rock when it cuts the laser beam. Using the value of speed, the player can easily work on his consistency without having to refer visually to the distance travelled by the rock. The app lets you read speed data in numerous units such as km/h, mph, m/s. The app also allow conversion of speed data at the hog line into approximation of commonly used split times such as back-line to hog-line or T-line to hog line. Here are some features : All Speed Units : Free and Pro Version Dual display : Free and Pro Version Detail display : Free and Pro Version Rock Circumference Setting: Free and Pro Version Between shot timer : Free and Pro Version Hog to hog split times : Pro Version Audio feedback : Pro Version Side by side practice : Pro Version Multi-Chronocurl : Pro Version Email of practice data : Pro Version Multiple Rock circumference: Upcoming Pro Version

About

Onform

This app enables coaches to provide detailed video feedback and communicate effectively with athletes, both remotely and in person. It offers tools for analysis, markup, and direct messaging to streamline coaching and improve athlete performance.

Highlights
  • Video feedback with markup tools
  • Slow motion and comparison analysis
  • Voice-over and text messaging
  • 3D analysis for select sports
  • Organize athletes and teams
  • High-speed video recording
Features
Currently charting
Read full description

Onform is a mobile video coaching platform that helps coaches provide video feedback and communicate with athletes. With built-in individual and group communication tools, coaches can stay connected with remote and in-person athletes using voice-overs, messaging, and file/video sharing. Coach smarter, give athletes a better experience (athletes pay no fee to use the app with you), and get your time back. Expand your business with video coaching and manage more clients in less time. WHAT CAN YOU DO WITH ONFORM? COACH IN-PERSON AND REMOTE ATHLETES • Give in-person athletes instant visual feedback using slow motion, markup, and analysis tools they can review during or after a session. • Reach athletes wherever they are and generate new revenue through remote consultations and training. SHARE FEEDBACK • Use voice-over recording and markup tools to clearly highlight areas for improvement. • Use 3D golf analysis and skeleton tracking to visualize movement in new ways (requires iOS 18 or later). • Share video feedback privately or through broadcast messages so athletes can revisit your insights. CREATE ACCOUNTABILITY • Provide feedback without needing to be on a live call or in person. • Stay connected with athletes while traveling or between sessions. • Help athletes and teams stay accountable to the work required to improve. DRIVE EFFICIENCY • Organize teams and 1:1 interactions in one place. • Easily manage and communicate with hundreds of athletes. APP FEATURES • Compare two videos side by side or overlaid to analyze form and track improvement. • Record high-speed video from multiple angles at up to 240 FPS on supported devices, or capture video from external cameras. • Pause and resume recordings to capture multiple moments in a single video. • Auto-detect recordings for Golf, Baseball, and Softball, or use a Bluetooth camera trigger or the Onform Apple Watch app to control recording. • For golf, get 3D swing metrics and shot data from Garmin R10 and Full Swing KIT. • Use fine scrubbing, slow motion, and video markup tools for detailed analysis. • Record voice-overs and share them instantly. Instructor Cam lets you add video of yourself speaking for more personalized feedback. • Organize videos by athlete or team. Sort private and shared videos, and add titles and tags for easy search. • Automatically sync videos across your devices while Onform intelligently manages on-device storage. • Use 1:1 and group chat to exchange videos, share training information, and coordinate logistics. • Broadcast messages privately to athletes using Collections. • Save frequently used replies. • Use Pocket Radar and Stalker Radar as recording triggers. PRICING Simple pricing for athletes and coaches. Individuals can choose the Standard plan for $9.99/month or the fully featured Premium plan for $14.99/month. Coaches can choose from three tiers: • Coach Basic: $19.99/month • Coach Standard: $39.99/month • Coach Pro: $59.99/month, including unlimited clients Quarterly and yearly subscriptions are available at discounted rates. Payment will be charged to your Apple ID account at purchase confirmation. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://onform.com/terms-of-use/

Screenshots

Chronocurl4 screens
Onform4 screens

Verdict

The call

The clearest difference is in-app purchases: Chronocurl at none against Onform's 11. Chronocurl also leads on review sentiment (100% vs 69%) and iOS requirement (12.0 vs 18.6). Onform's advantage is update cadence (every 5 days vs every 9 months) and chart position (#76 vs unranked). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Onform sells 11 in-app purchases, starting at $4.99 per month. Chronocurl asks for nothing beyond the download.

UpkeepUpdate frequency

Chronocurl ships an update every 9 months, Onform every 5 days. The most recent releases landed on October 11, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 5 level
Chronocurl versus Onform: the parameters behind the verdict, then further details
ParameterChronocurlOnform
PriceFreeFree
Rating—4.8 (8.7K ratings) — better
Positive reviews100.0% of reviews — better69.1% of reviews
Number of ratings—8.7K — better
Update frequencyEvery 9 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#76 — better
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS12.0 — better18.6
Further details — not scored
Size34 MB199 MB
Age rating4+4+
DeveloperGuy SimardOnForm, Inc.

Customer experience

Chronocurl

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Onform

All ratings8,680 ratings
Positive95.2%
Neutral1.6%
Negative3.2%
Written reviews285 reviews
Positive69.1%
Neutral6.3%
Negative24.6%

Bugs and requests

Chronocurl

Not enough reviews yet to summarise bugs or requests.

Onform

Reported bugs

3 issues
  • Chat feature not working
  • Inconsistent video recording
  • Syncing issues between devices

Requested features

5 requests
  • Ability to import multiple videos at once
  • More customization options
  • Improved video scrubbing and playback controls
  • Local video storage option
  • Expanded sports support beyond golf

In-app purchases

None

Chronocurl

No in-app purchases

11 purchases

Onform

Subscriptions11
  • Personal Monthly$4.991 Month
  • Individual Standard Monthly$9.991 Month
  • Individual Premium Monthly$14.991 Month
Show 8 more
  • Coach Basic Monthly$19.991 Month
  • Coach Monthly$29.991 Month
  • Coach Standard Monthly 1 Seat$39.991 Month
  • Personal Yearly$49.991 Year
  • Coach Pro Monthly 1 Seat$59.991 Month
  • Team/Academy Monthly$79.001 Month
  • Coach Yearly$299.991 Year
  • Team/Academy Yearly$799.001 Year

Questions

Is Chronocurl free?
Chronocurl is free to download, with no in-app purchases.
Is Onform free?
Onform is free to download, with in-app purchases available.
Do Chronocurl or Onform have ads?
Neither Chronocurl nor Onform shows ads.
Which is updated more often, Chronocurl or Onform?
Chronocurl ships an update every 9 months, and Onform every 5 days. Most recently, Chronocurl was updated on October 11, 2026 and Onform on October 20, 2026.

Other comparisons