# TreadCal — Incline walk calories & climbs

> Incline treadmill workout calorie and climb estimator with Apple Watch integration. (iPhone/iPad app by Carbide Studios.)

- Source: https://appshunter.io/ios/app/treadcal/id6814314337 (this page in markdown: same URL + `.md`)
- Developer: [Carbide Studios](https://appshunter.io/developer/6814314339)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.0 · 6 MB
- Languages: American English
- Released: 2026-10-11
- Data updated: 2026-10-29
- Monetization: free with in-app purchases

## What is TreadCal?

TreadCal helps you understand your incline-treadmill and walking-pad workouts.

Enter your treadmill’s speed and incline—or measure its stopped deck with your iPhone—then start your workout on Apple Watch. TreadCal combines your weight, grade, speed, optional weighted vest, and rail use to estimate active calories.

MAKE EVERY CLIMB COUNT
• Incline-aware active-calorie estimates
• Vertical climb and approximate treadmill distance
• Live heart rate and heart-rate zones on Apple Watch
• Time spent in each heart-rate zone
• Weighted-vest calorie contribution included in your total
• Workout receipts with steps, duration, and workout settings
• A shareable climb card for every workout; the artwork grows with the climb

MEASURE YOUR TREADMILL
Use two-position iPhone calibration to map your treadmill’s console setting to measured percent grade. Calibrate only while the belt is stopped.

YOUR WORKOUT IS YOURS
Apple Watch workouts require permission to write Workouts and Active Energy to Apple Health. Other Health read permissions and Motion permission are optional. TreadCal keeps your profile, calibration, and workout history on your devices. No account, ads, or analytics.

TRY THREE WORKOUTS
Your first three completed workouts are included. Unlock unlimited workouts with a single TreadCal Pro purchase. No subscription.

TreadCal is an exercise estimator, not a medical device. Calories and heart-rate zones are estimates; distance depends on the speed you enter. Never place your iPhone on a moving treadmill belt.

Heart-rate zone features require watchOS 27 and appropriate permissions.

## Key features

- Incline-aware calorie estimates
- Vertical climb and distance tracking
- Live heart rate and zones on Apple Watch
- Weighted vest calorie contribution
- Shareable climb cards
- Treadmill calibration

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| TreadCal Pro | $3.99 | one-time |


## Is TreadCal safe?

Not enough ratings yet to assess TreadCal.

## Is TreadCal legit?

TreadCal has limited verification signals. The AppsHunter Legitimacy Score for TreadCal is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about TreadCal

### How does TreadCal estimate calories burned?

TreadCal estimates active calories by combining your weight, the treadmill's speed and incline, and whether you use a weighted vest or rails. It provides incline-aware estimates for each climb.

### What Apple Watch features does TreadCal use?

TreadCal uses Apple Watch for live heart rate monitoring and to display heart-rate zones during your workout. It requires watchOS 27 and appropriate permissions to write workout data to Apple Health.

### Can I use TreadCal without an Apple Watch?

While TreadCal integrates deeply with Apple Watch for live data, you can still input treadmill settings and measure your treadmill's grade with your iPhone. However, the full real-time experience is optimized for Apple Watch.

### How accurate is the distance measurement in TreadCal?

The distance displayed in TreadCal depends on the speed you enter for your treadmill workout. It is an approximation based on your input and the treadmill's settings.

### Does TreadCal have ads?

No, TreadCal is ad-free. The developer explicitly states that there are no ads or analytics, ensuring a distraction-free workout tracking experience.

### What is the TreadCal Pro purchase?

The first three workouts are free, and you can unlock unlimited workouts with a single TreadCal Pro purchase. This is a one-time purchase, not a subscription.

### Is TreadCal suitable for all ages?

TreadCal has an age rating of 4+, making it accessible for a wide range of users. However, it is an exercise estimator and not a medical device.

### How often is TreadCal updated?

The latest version, 1.0.3, was released on October 21, 2026, indicating recent development activity. The app was initially released on October 11, 2026.

## Version history (last 4 releases)

### 1.0.4 — 2026-10-28

- After your 3 included workouts, TreadCal shows your own totals and how to keep going.
- Walks under 5 minutes no longer use up an included workout.
- Apple Watch tells you before your last included workout.
- Each treadmill now remembers its own speed, incline, walk or run, and handrails.

### 1.0.3 — 2026-10-21

A smoother first run: TreadCal asks for Apple Health once, in a single sheet, and double-checks weights that look like kilograms. You can now rename a treadmill without measuring it again. Clearer messages when your Apple Watch isn’t paired, and better layouts at larger text sizes.

### 1.0.2 — 2026-10-19

TreadCal no longer asks for Apple Health access every time you start a workout. It asks once, and again only if a permission it needs to save your workout is still undecided.

### 1.0.1 — 2026-10-12

No release notes.

## Apps similar to TreadCal

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Choobi](https://appshunter.io/ios/app/choobi/id6773347644) | 5.0 (3) | Free | Health & Fitness |
| [Uphill: Treadmill Tracker](https://appshunter.io/ios/app/uphill-treadmill-tracker/id6794564469) | — | Free | Health & Fitness |
| [Get a Grip: Finger Training](https://appshunter.io/ios/app/get-a-grip-finger-training/id6804236185) | 5.0 (4) | Free | Health & Fitness |
| [Force Board](https://appshunter.io/ios/app/force-board/id1575849276) | 3.8 (16) | Free | Health & Fitness |
| [Klemy: Treadmill Workouts](https://appshunter.io/ios/app/klemy-treadmill-workouts/id6744367820) | 3.9 (9) | Free | Health & Fitness |
| [OOLER](https://appshunter.io/ios/app/ooler/id1381533477) | 4.8 (3,177) | Free | Health & Fitness |

---

*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 2026-10-29.*