# Video tachometer vs CORE Service

The clearest difference is review sentiment: Video tachometer at 85% against CORE Service's 0%. Video tachometer also leads on rating (4.6 vs 3.6) and ratings volume (84 vs 19). CORE Service's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Video tachometer sells 1 one-off in-app purchase. CORE Service asks for nothing beyond the download.

Video tachometer holds the better App Store score, 4.6 against 3.6. Both are backed by a comparable volume of ratings — 84 and 19 respectively. Written reviews point the same way: 85% of Video tachometer's written reviews are positive against 0% of CORE Service's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Video tachometer | CORE Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (84 ratings)](https://appshunter.io/ios/app/video-tachometer/id1492583587/reviews)** | [3.6 (19 ratings)](https://appshunter.io/ios/app/core-service/id1566612696/reviews) |
| Number of ratings | **84** | 19 |
| Positive reviews | **84.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 47 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dmitriy Kharutskiy](https://appshunter.io/developer/817385891) | [Lennox Industries](https://appshunter.io/developer/355049651) |

## What reviewers say

### Video tachometer

[App page](https://appshunter.io/ios/app/video-tachometer/id1492583587)

This app uses slow-motion video to create a strobe light effect, allowing you to measure rotational speeds. It records video with detailed information like frame rate and exposure, and offers customizable text overlays.

**Highlights:** Strobe light effect simulation, Rotational speed measurement (RPM/Hz), Slow-motion video recording, Customizable text overlays on video, Adjustable frame rate and exposure, Records 4K video (if supported)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 💡 Clever approach
- 🚀 Works beautifully
- 👍 Very handy
- 👍 Accurate measurements

**What reviewers complain about**

- 💸 Too much in paid version
- 💰 Free version limited
- 🤔 Confusing settings initially
- 👎 Unclear about recording
- 👎 No built-in video recording

**Reported bugs**

- Does not read anything
- Pop-ups for paid features
- Interface visible in screen recording

**Requested features**

- Ability to record video
- Slow phase shift mode
- Improved UI for initial setup
- Long press for gradual increment/decrement


### CORE Service

[App page](https://appshunter.io/ios/app/core-service/id1566612696)

This app provides a wireless interface for commercial HVAC technicians to control and service specific Lennox rooftop units. It offers guided setup, enhanced testing, and parameter configuration to streamline the service process.

**Highlights:** Wireless mobile service app, Guided setup with progress indicators, Enhanced test functionality, Real-time sensor readings and trending, Parameter configuration, Exportable setup summaries

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Video tachometer free?

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

### Is CORE Service free?

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

### Which has better reviews, Video tachometer or CORE Service?

Video tachometer is rated higher. Video tachometer averages 4.6 out of 5 from 84 ratings, while CORE Service averages 3.6 from 19 ratings.

### Do Video tachometer or CORE Service have ads?

Neither Video tachometer nor CORE Service shows ads.

### Which is updated more often, Video tachometer or CORE Service?

Video tachometer ships an update every 3 months, and CORE Service every 3 months. Most recently, Video tachometer was updated on October 4, 2026 and CORE Service on October 7, 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.*