# Base Builder — Cardio workout training alerts

> Cardio workout trainer with heart rate and distance audio/haptic alerts. (iPhone/iPad app by Douglas Curtis.)

- Source: https://appshunter.io/ios/app/base-builder/id1546116629 (this page in markdown: same URL + `.md`)
- Developer: [Douglas Curtis](https://appshunter.io/developer/1546116631)
- Category: Health & Fitness
- Price: Free
- Rating: 3.43/5 from 7 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: English
- Released: 2021-04-12
- Data updated: 2026-07-22
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/base-builder/id1546116629/reviews.md

## What is Base Builder?

Base Builder provides you with timely heart rate alerts and audio cues to help you maintain your target workout effort.  Workouts are integrated into the Health app.

Voice alerts provide detailed information regarding your distance, pace, and heart rates.

Haptic alerts notify you when you have exceeded your heart rate limit.  Feedback is constant until your heart rate is below your configured limit.

Distance triggered audio cues let you configure the workout statistics that are announced to you.  Workout statistics include distance, heart rate, and pace.

## Key features

- Heart rate alerts
- Audio cues for distance and pace
- Haptic feedback for heart rate limits
- Health app integration
- Customizable workout statistics announcements

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/base-builder/id1546116629/reviews.md

### 1/5 — App won’t open

*2023-01-22*

I wanted this app to track my heart rate during exercise. I purchased it in the App Store and instead of it downloading, it just says “purchased “ blacked out. I went to my settings to see if it’s in my list of apps and it is nowhere to be found since it seems that it has not downloaded at all. Please fix!!

### 5/5 — Works

*2021-06-07*

This app is much much more useful than the one you have to pay for (beat watcher). I wish this app could collect cadence data, too, for outdoor running. But aside from that you can run this app while running and it warns you when your heart rate is above the desired limit. You can run this app concurrently with music app, too.

**Developer response:** Thank you for the review!  I’m interested to hear more regarding your cadence feature request.  If you would like to provide more details please email me at support@basebuilder.app. Thanks for using Base Builder!

### 1/5 — Bad

*2021-05-20*

This app did not work at all

**Developer response:** Sorry to hear!  I'm happy to assist if you can provide more details to the support email address.  Until then, please ensure you have granted HealthKit permissions to the app.

## Frequently asked questions about Base Builder

### What devices does Base Builder support?

Base Builder is available on Apple Watch, iPhone, and iPod. It is designed to provide real-time workout feedback across these platforms.

### How does Base Builder help with heart rate training?

Base Builder provides timely audio and haptic alerts to help you maintain your target heart rate zone. It notifies you when you exceed your heart rate limit and provides constant feedback until you are within the desired range.

### Can Base Builder track my workout distance and pace?

Yes, Base Builder offers distance-triggered audio cues that announce workout statistics such as distance, heart rate, and pace. This allows you to stay informed about your progress without interrupting your workout.

### Does Base Builder integrate with Apple Health?

Yes, workouts tracked with Base Builder are integrated into the Health app. This allows for seamless data synchronization and a comprehensive view of your fitness activities.

### What is the age rating for Base Builder?

Base Builder has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger individuals engaging in fitness activities.

### How often is Base Builder updated?

The latest version of Base Builder is 1.1.0, which was last updated on September 20, 2021. Information on its update frequency beyond this is not provided.

### Does Base Builder have ads?

No, Base Builder does not contain advertisements. As a free application, it provides an uninterrupted user experience without any ad interruptions.

### What do users think of Base Builder?

Base Builder has a rating of 3.4 stars from 7 ratings. This suggests a mixed user reception, with some users finding it useful for workout alerts and others perhaps experiencing limitations.

## Version history (last 5 releases)

### 1.1.0 — 2021-09-20

This app has been updated by Apple to display the Apple Watch app icon.

Always on display support

### 1.0.4 — 2021-07-21

watchOS 8 compatibility updates.

### 1.0.3 — 2021-06-21

Bug fix for toggling between voice and haptic alerts

### 1.0.2 — 2021-05-16

Adding instantaneous pace option for outdoor workouts.

### 1.01 — 2021-04-19

Interface changes

## Apps similar to Base Builder

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [HeartMeter+](https://appshunter.io/ios/app/heartmeter-plus/id914603059) | 3.0 (2) | Free | Health & Fitness |
| [Simple Zones](https://appshunter.io/ios/app/simple-zones/id1533922808) | 4.0 (48) | Free | Health & Fitness |
| [gBeat: Live Heart Rate Sharing](https://appshunter.io/ios/app/gbeat-live-heart-rate-sharing/id1562726161) | 5.0 (7) | Free | Health & Fitness |
| [Union Fit Hub](https://appshunter.io/ios/app/union-fit-hub/id1628802971) | 5.0 (2) | Free | Health & Fitness |
| [RunTools](https://appshunter.io/ios/app/runtools/id1313778538) | 5.0 (7) | Free | Health & Fitness |
| [Tribe Inc.](https://appshunter.io/ios/app/tribe-inc/id1517775081) | 5.0 (3) | Free | Health & Fitness |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-22.*