# OOLER vs TreadCal

The clearest difference is in-app purchases: OOLER at none against TreadCal's 1. OOLER also leads on ratings volume (3.2K vs 1) and iOS requirement (14.0 vs 18.0). TreadCal's advantage is update cadence (weekly vs every 4 weeks) and rating (5.0 vs 4.8). On price, ads and device support there is nothing between them.

Both are free to download. TreadCal sells 1 one-off in-app purchase. OOLER asks for nothing beyond the download.

TreadCal holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: OOLER has 3.2K ratings behind it against 1, so its average is the more settled of the two.

OOLER ships an update every 4 weeks, TreadCal weekly. The most recent releases landed on November 2, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | OOLER | TreadCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (3.2K ratings)](https://appshunter.io/ios/app/ooler/id1381533477/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/treadcal/id6814314337/reviews)** |
| Number of ratings | **3.2K** | 1 |
| Positive reviews | 40.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 6 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Sleepme Inc.](https://appshunter.io/developer/1381533476) | [Carbide Studios](https://appshunter.io/developer/6814314339) |

## What reviewers say

### OOLER

[App page](https://appshunter.io/ios/app/ooler/id1381533477)

This app controls a smart sleep system that regulates your sleeping surface temperature for optimal rest. It allows for personalized schedules, temperature adjustments, and features like a gentle warming alarm to improve your sleep and wake routines.

**Highlights:** Adjustable mattress temperature (55-110°F), Personalized sleep schedules, Temperature variations for sleep, Warm Awake alarm feature, Adjustable fan speed modes

**In-app purchases:** none

**What reviewers like**

- 💤 Improved sleep quality
- ❄️ Effective cooling/heating
- 🌙 Warm wake-up feature
- 🌟 Life-changing product
- 🛌 Comfortable sleeping experience

**What reviewers complain about**

- 🐛 Buggy app with connectivity issues
- 🕰️ Unreliable scheduling/timer features
- 🚫 Requires account/login to use
- 💧 Lack of low water level notifications
- 📱 App needs more advanced functionality

**Reported bugs**

- App randomly resets temperature settings
- Schedules not working as expected
- Bluetooth connectivity issues
- App logging users out unexpectedly
- Water level monitoring not functioning properly

**Requested features**

- Add Celsius temperature display option
- Implement variable/customizable sleep schedules
- Integrate with smart home platforms (Alexa, HomeKit, etc.)
- Add automatic shut-off timer feature
- Improve app UI and user experience


### TreadCal

[App page](https://appshunter.io/ios/app/treadcal/id6814314337)

Estimate calories burned and vertical climb during incline treadmill workouts. It uses your weight, speed, incline, and optional weighted vest to provide accurate estimates. Shareable climb cards summarize your progress.

**Highlights:** 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

**Features:** Apple Watch app

**In-app purchases (1)**

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


## Frequently asked questions

### Is OOLER free?

OOLER is free to download, with no in-app purchases.

### Is TreadCal free?

TreadCal is free to download, with in-app purchases available.

### Which has better reviews, OOLER or TreadCal?

TreadCal is rated higher. OOLER averages 4.8 out of 5 from 3.2K ratings, while TreadCal averages 5.0 from 1 ratings.

### Do OOLER or TreadCal have ads?

Neither OOLER nor TreadCal shows ads.

### Which is updated more often, OOLER or TreadCal?

OOLER ships an update every 4 weeks, and TreadCal weekly. Most recently, OOLER was updated on November 2, 2026 and TreadCal on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*