PeakID vs Understanding Activity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PeakID
Track your workouts, meals, and progress towards fitness goals with personalized guidance from your coach. Schedule activities, monitor body measurements, and receive reminders. Connects with wearable devices for seamless data syncing.
- Workout tracking
- Meal logging
- Progress monitoring
- Coach messaging
- Body measurement tracking
- Wearable device integration
- Push notification reminders
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With the PeakID App, you can start tracking your workouts and meals, measuring results, and achieving your fitness goals, all with the help of your coach. - Access training plans and track workouts - Schedule workouts and stay committed by beating your personal bests - Track progress towards your goals - Manage your nutrition intake as prescribed by your coach - Set health and fitness goals - Message your coach in real-time - Track body measurements and take progress photos - Get push notification reminders for scheduled workouts and activities - Connect to wearable devices like Apple Watch (synced to Health app), Fitbit and Withings to sync body stats instantly Download the app today!
Understanding Activity
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This app was designed for participants in Understanding Society: The UK Household Longitudinal Study. As part of this study, participants aged 16 and over will be sent a Garmin smartwatch and asked to install and wear it, to collect data on their physical activity, sleep, and geolocation. The geolocation data will be collected directly from the respondent’s smartphone, if the phone and Garmin are within Bluetooth range. If they are not in range (suggesting that the participant has gone somewhere without their smartphone), the geolocation data will be captured by the Garmin. The purpose of this app is to retrieve all data from the Garmin as well as the geolocation data from the phone. The Garmin data will automatically be transferred to this app at regular intervals. In addition, participants will be asked to complete a brief daily survey within the app. This survey consists of 11 questions and takes less than 3 minutes to complete. The data collected by the app will not include any information about who the participant is. Understanding Society researchers will download the data collected by this app, process the data to derive indicators that do not identify you or your locations, and make the anonymous data available to researchers. The Understanding Society study is conducted by the Institute for Social and Economic Research at the University of Essex and funded by the Economic and Social Research Council.
Screenshots
Verdict
The clearest difference is update cadence: Understanding Activity at fortnightly against PeakID's every 6 weeks. PeakID's advantage is device support (4 vs 2). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PeakID ships an update every 6 weeks, Understanding Activity fortnightly. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.
| Parameter | PeakID | Understanding Activity |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 16.0 |
| Further details — not scored | ||
| Size | 175 MB | 92 MB |
| Age rating | 4+ | 4+ |
| Developer | JG Physique Ltd | Avicenna Research Inc. |
In-app purchases
PeakID
No in-app purchases
Understanding Activity
No in-app purchases
Questions
Is PeakID free?
Is Understanding Activity free?
Do PeakID or Understanding Activity have ads?
Which is updated more often, PeakID or Understanding Activity?
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