Comparison

ErgData vs Intervals.icu Companion

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

Head to head
About

ErgData

This app acts as a personal training partner for Concept2 equipment. It allows users to set up custom workouts, view real-time stats, track progress, and sync data with online platforms. It also offers workout of the day challenges and detailed post-workout analysis.

Highlights
  • Custom workout setup
  • Real-time workout stats
  • Progress tracking
  • Sync with Concept2 Logbook
  • Workout of the Day
  • Post-workout analysis
  • Apple Watch compatibility
Features
Read full description

ErgData from Concept2 is your personal training partner. Set up workouts from your phone or tablet, view customized stats and information during workouts, track your progress, sync with the Concept2 Online Logbook, take part in the Workout of the Day and much more. Features -Set up workouts from your phone, making it simple to create even the most complex of interval workouts. You can choose to store workouts as favorites or rerow past efforts straight from ErgData. -Set the Concept2 Workout of the Day on the monitor with a single tap. -Compatible with the Apple Watch. Watch users can now see real-time heart rate data on the screen during the workout and in analysis afterwards. -Choose from different workout display options, including small, medium and large data screens, a pace graph screen, an interval and split table or a pace boat. Easily swipe between screens during your workout. Customize the data shown to suit you. -Syncs with the Concept2 Online Logbook, making it easy for you to take part in our many challenges. From the Online Logbook, your workouts can get sent to platforms such as Strava, Garmin Connect or Training Peaks. -Detailed post-workout analysis helps you know exactly what happened during your workout. See all your interval and split data, as well as pace and rate graphs, plus how long you spent in each heart rate zone. -Optional voice guidance to send audible workout data and results. Technical Specifications -Compatible with the PM5. -Compatible with the Concept2 RowErg, SkiErg and BikeErg -Connects to Apple Health -Connects to PM5 via Bluetooth only Note: Please do not have a USB stick in the PM5 at the same time as using ErgData, as this may prevent workouts being saved.

About

Intervals.icu Companion

This companion app visualizes your fitness, fatigue, and form trends using data from Intervals.icu. It offers configurable widgets for desktop and home screens, along with Apple Watch faces, to provide quick access to your key metrics and automatic data updates.

Highlights
  • Interactive Fitness, Fatigue & Form Graph
  • Apple Watch App for data viewing
  • Multi-Platform Widgets (iOS, iPadOS, watchOS, macOS)
  • Vitals Tracking (HRV, readiness, sleep)
  • Automatic Data Updates via notifications
  • Sports Summary Widget for goal tracking
  • Customizable Data Settings
Features
Read full description

Intervals Companion is a powerful third-party companion app for Intervals.icu, bringing your training data to iOS, watchOS, and macOS with beautiful widgets, deep Apple Health integration, and advanced analytics. Two-Way Apple Health Sync Automatically sync workouts recorded on Apple Watch or iPhone to Intervals.icu, and push Intervals.icu activities back to Apple Health to close your Activity Rings. Sync daily health metrics like HRV, sleep scores, and readiness scores between Apple Health and Intervals.icu, keeping all your data in one place. Apple Watch Workout Sync Convert planned workouts from your Intervals.icu calendar and send them directly to Apple Watch so your structured sessions are ready to go when you are. FIT File Import Manually import FIT files to Intervals.icu and/or Apple Health. Bring in workouts from any device or platform with a few taps. Metrics & Custom Charts Build personalized charts and widgets across all fitness and health metric fields. Visualize the data that matters most to you, your way. Library Browse your Intervals.icu workout library and add workouts directly to your training calendar from your phone. Training Analytics - Interactive Fitness, Fatigue & Form graph with drag-to-inspect for past activities and planned workouts - Predict future form based on your scheduled training load - Vitals tracking: HRV, readiness & sleep scores, resting and sleeping heart rates - Distance splits and pace zone charts on activity detail screens Chat & Community - Send and receive private messages with coaches and athletes directly from your phone - View and post comments on activities to stay connected with your training community - Push notification alerts for new messages and activity comments Widgets & Watch - Home screen widgets for iOS, iPadOS, and macOS - Apple Watch app and watch face complications - Sports Summary widget: weekly goal rings for distance and time with customizable colors - Silent push notifications trigger automatic updates when new activities or wellness data arrive on Intervals.icu Intervals Companion is an independent hobby project, not affiliated with or endorsed by Intervals.icu. Fitness metrics and scores are for informational purposes only — not a substitute for professional medical or coaching advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ErgData4 screens
Intervals.icu Companion4 screens

Verdict

The call

The clearest difference is review sentiment: Intervals.icu Companion at 93% against ErgData's 45%. Intervals.icu Companion also leads on rating (4.9 vs 4.7). ErgData's advantage is in-app purchases (none vs 4) and ratings volume (5.1K vs 35). On price, update cadence, ads and monetization model 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. Intervals.icu Companion sells 4 in-app purchases, starting at $9.99 per year. ErgData asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intervals.icu Companion holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: ErgData has 5.1K ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 45% of ErgData's written reviews are positive against 93% of Intervals.icu Companion's.

UpkeepUpdate frequency

ErgData ships an update every 2 weeks, Intervals.icu Companion every 3 weeks. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

Scorecard5 real differences · 5 level
ErgData versus Intervals.icu Companion: the parameters behind the verdict, then further details
ParameterErgDataIntervals.icu Companion
PriceFreeFree
Rating4.7 (5.1K ratings)4.9 (35 ratings) — better
Positive reviews45.4% of reviews93.3% of reviews — better
Number of ratings5.1K — better35
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS16.0 — better18.6
Further details — not scored
Size74 MB70 MB
Age rating4+4+
DeveloperConcept2, Inc.McEwen Labs LLC

Customer experience

ErgData

All ratings5,055 ratings
Positive93.0%
Neutral1.6%
Negative5.4%
Written reviews678 reviews
Positive45.4%
Neutral11.2%
Negative43.4%

Intervals.icu Companion

All ratings35 ratings
Positive97.1%
Neutral0.0%
Negative2.9%
Written reviews15 reviews
Positive93.3%
Neutral0.0%
Negative6.7%

Bugs and requests

ErgData

Reported bugs

6 issues
  • Workout data not saving
  • Heart rate data freezing
  • Disconnects during workouts
  • Sync issues with Apple Health and Strava
  • Login issues and frequent logouts
Show 1 more
  • Incompatibility with older firmware versions

Requested features

8 requests
  • Add friend mode
  • Integrate Apple Watch support
  • Add manual workout entry
  • Implement landscape mode for iPad
  • Integrate pace calculator
Show 3 more
  • Add recovery heart rate tracking
  • Display METS data
  • Allow custom heart rate zones in logbook

Intervals.icu Companion

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ErgData

No in-app purchases

4 purchases

Intervals.icu Companion

Subscriptions1
  • Yearly Supporter$9.991 Year
One-time3
  • Tip$9.99
  • Support Tip$19.99
  • Tip$19.99

Questions

Is ErgData free?
ErgData is free to download, with no in-app purchases.
Is Intervals.icu Companion free?
Intervals.icu Companion is free to download, with in-app purchases available.
Which has better reviews, ErgData or Intervals.icu Companion?
Intervals.icu Companion is rated higher. ErgData averages 4.7 out of 5 from 5.1K ratings, while Intervals.icu Companion averages 4.9 from 35 ratings.
Do ErgData or Intervals.icu Companion have ads?
Neither ErgData nor Intervals.icu Companion shows ads.
Which is updated more often, ErgData or Intervals.icu Companion?
ErgData ships an update every 2 weeks, and Intervals.icu Companion every 3 weeks. Most recently, ErgData was updated on September 26, 2026 and Intervals.icu Companion on September 25, 2026.

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