As well as the Frequently asked Heart Graph questions listed here, you may find our
Tutorial Videos
 and list of Known Issues useful:


My Premium Feature purchase has disappeared!
Very occasionally during an upgrade of the app from the App Store, the record of your purchase of Premium Features can be lost. If this happens, please use the Restore button on the Premium Features page to restore your purchase. No charge will be made. You can also use this feature to apply Premium Features to Heart Graph if you have multiple devices (e.g., an iPhone and an iPad).

Please be sure to use the Apple ID you originally used to make the purchase – Restore will not work if you use a different one!

Heart Graph appears to be in Chinese or Russian, but I want English.
Is Heart Graph starting up looking like one of the following?


This is a configuration problem with your phone rather than a problem with Heart Graph. Heart Graph is offered in English, Chinese and Russian. Because your phone’s language is not one of those and we don’t have an appropriate translation, the phone is taking the next “best match” language, but English is below Chinese and/or Russian in the order it is using to determine that best match.

In the Apple Settings app, go to General Settings -> Language and Region. There you will see a “preferred language order”, and if you tap the Edit button at the top right, you can change that to move English above Russian and Chinese in the list.

Why hasn’t Heart Graph installed on my Apple Watch?
Normally, after installing Heart Graph from the App Store, you can immediately see the Heart Graph app in the list of available apps for installing on your Apple Watch in the Watch app on your iPhone. However, sometimes it doesn’t show up automatically: in this case, simply reboot both your Watch and Phone and that will fix the problem.

Where are the app settings?
All Heart Graph’s settings are available by tapping the cog icon on the Home screen of the app.FAQ_settings

How do I set my own heart rate zones?
To set your own zones, tap ‘Heart rate zones’ in the app settings. You can either use the default formula (220 – age) by tapping the Default button, or you can configure each boundary independently by tapping the grey values between each zone. If you integrate with Health, the app will already know your age; otherwise the default values will assume you are 20 years old.
Note that heart rate zones are a Premium Feature, and must be explicitly turned on after purchase.


How do I see how many calories I’ve burned?
To enable calorie calculation, you must first enter your age, weight and gender (these can be automatically extracted from Health if you have chosen to integrate). Knowing these values allows Heart Graph to use a more accurate formula for calorie calculation.
There are two modes of operation: “Count”, where the app will simply display the number of calories burned as you exercise, or “Target”, where the app will show you progress towards a target you can configure.
Note that calorie calculation is a Premium Feature, and must be explicitly enabled after purchase.


How do I transfer workouts between my iPhone and iPad?
With Heart Graph v5.5, you can now sync all workouts recorded on any of your devices to all other devices, automatically. Look for the “Sync between devices” option in the Heart Graph settings. Alternatively, workouts can be transferred between devices by exporting in TCX format from one device, then importing on the other device.

How do I import workouts from email and Dropbox?
Workouts (stored as Garmin TCX files) can be imported from many other iOS apps, including Mail and Dropbox. The exact mechanism may vary slightly between apps, but for Mail, if you press and hold on the workout file attached to an email, you will be presented with an option to “Copy to Heart Graph”. When you choose that, the workout will automatically be imported.
For Dropbox, first select your file in Dropbox, then choose the “…” icon, then “Export”. You will be given an option to “Copy to Heart Graph”, and if you select that the session will import.
Note that importing workouts is a Premium Feature.

How do I share my graphs and data with other people and other apps?
Heart Graph offers two options for sharing your workout data:

  1. A summary, including:
    • an image of the heart rate graph for the whole session
    • an image of the heart rate zone histogram
    • a text summary of the workout statistics, including your own notes
  2. Sharing a data file containing all the session data in Garmin TCX format, comma separated variable (CSV) format or Polar HRM format.

The summary can be sent by email, Messages etc., and can also be used to print the graphs or save them to the iOS Files app.

The TCX-format session data can be used to transfer sessions to Heart Graph on another device (e.g., via AirDrop), to your Dropbox account or iOS Files, or to another app. CSV data is more useful for you to do your own analysis in Excel or Apple Numbers, while HRM format is used by Polar apps to import data.

While viewing a workout, tap the action button, then choose whether you want to share a summary or the session data. For controlling the output format, see the export format FAQ.


How do I control the export format for  workouts?
Heart Graph allows you to export workouts in three formats: for exchange with other apps, you should use Garmin TCX format export, while for your own analysis, CSV format is likely to be easier to work with in programs such as Numbers or Excel; Polar HRM format is offered for transfer to Polar apps.
The export format is controlled using the “Data Sharing” section of the app settings, or by choosing “Export settings” when sharing session data direct from the session itself.
Note that exporting workout data is a Premium Feature.

Why isn’t my heart rate sensor isn’t recognised by Heart Graph?

It is unusual for Heart Graph to have problems connecting to your sensor, but it does sometimes happen. Please see our separate Sensor Problems page for advice on what to do.

Why am I seeing erratic heart rate readings in Heart Graph?

Erratic heart rate readings are nearly always the result of a poor connection between your heart rate sensor and your body. Most sensor detect electrical signals from the heart, and need their contacts to be moist for this to work. Particularly in cold climates, you may not sweat enough early in your workout to maintain this connection, which can result in the sensor sending erratic data to Heart Graph. You should also ensure that your sensor is snugly fitting on your body, since any movement could disrupt the contacts’ connection to your body. You may find the advice on our Sensor Problems page useful.

My Apple Watch went into Power Reserve mode during a workout: how do I access the heart rate data?
A fully charged Apple Watch (series 1) can typically record between 5 and 6 hours of heart rate data during a workout (when the Watch will record a sample approximately every 5 seconds). However, if the Watch enters Power Reserve mode during a workout, the data won’t be transferred to the iPhone at that point; however, when you next launch Heart Graph on your Apple Watch, all the data that was recorded will then be transferred. Additionally you can also use the “Custom time period” option of the “Health Import” screen to import that data manually.

How can I use my Apple Watch to record my resting heart rate while sleeping?
You can record short sessions of data while sleeping using the “Resting” session option when starting a new session. However, as described above, the Apple Watch battery will likely not last for an entire night of sleep, and the Watch will enter Power Reserve mode while recording. If you do want to record as much data as possible before the Watch enters Power Reserve mode, please see the above item on how to import that data after your Apple Watch has been recharged.

Alternatively, if you don’t need high frequency heart rate sampling every 5 seconds, you could simply wear your Watch while asleep (the Watch automatically takes heart rate samples approximately every 5-10 minutes whenever it is worn) and then use the “Custom time period” option of the “Health Import” screen to import that data manually when you wake up.

How do I get heart rate data into Apple’s Health app?
Apple’s Health app is intended to provide heart rate data to other apps, rather than apps writing heart rate data into Health. In iOS8, you can connect your existing Bluetooth heart rate sensor directly to Health in the Bluetooth section of Apple’s Settings app – whenever you wear your sensor, heart rate data will then be sent to Health. You can continue to use Heart Graph normally, as Heart Graph will continue to connect directly to your sensor at the same time as Health.

I think I found a bug – what should I do?
We strive to create high quality software with zero defects, but sometimes bugs do slip through. If you think you’ve found a bug, please report it to us using our Support page – we will be able to respond much faster than if you leave a review comment on the App Store, and it will allow us to ask for further information that may be necessary to get to the bottom of the problem. You can also check our Known Issues page to see if a fix is already in preparation.
Important note: we do not recommend deleting and reinstalling the app unless directed by one of our support team. Deleting the app will remove all data within the app, including existing workout data and any planned workouts you have designed.  
Once a fix is ready, it typically takes Apple around one week to approve a new version of an app for sale, so please bear with us while the updated version goes through Apple’s processes.

Are there any hidden features?
Heart Graph doesn’t include any specific hidden features, although you may find the following less obvious features useful:

  • If you use specific keywords when entering workout notes, you can then filter your workouts to look at just those containing specific keywords.
  • When performing a workout, you can change the calorie target just for that workout by tapping on the calorie display on the main workout screen.
  • When reviewing workouts, you can swipe up or down to move to the previous (or next) workout. If you have chosen to filter workouts in the workout list, you the swipe will take you to the neighbouring workout in your filtered list.
  • When comparing workouts, you can tap on any of the points in the graph to display the full workout data.
  • If you want to mute all sounds produced by the app, there is an option in the app settings.
  • When editing planned workouts, you can press an hold on a particular set to quickly duplicate it.
  • When editing planned workout, you can press and hold on a “super-set separator” to duplicate the entire super-set.
  • If you’ve designed your own “Planned Workout”, why not share it with other Heart Graph users using the option on the screen showing the workout details?
  • On the Apple Watch, you can change the duration of the graph currently showing by turning the digital crown.