# SensorLog vs iHorology

The clearest difference is price: iHorology at Free against SensorLog's $2.99. iHorology also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 18.0). SensorLog's advantage is review sentiment (69% vs 50%) and ratings volume (40 vs 4). On rating, update cadence, ads and device support there is nothing between them.

iHorology is free to download; SensorLog costs $2.99 up front. SensorLog sells 4 one-off in-app purchases. iHorology asks for nothing beyond the download.

SensorLog holds the better App Store score, 4.4 against 4.3. That said, the two scores are not equally well evidenced: SensorLog has 40 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 69% of SensorLog's written reviews are positive against 50% of iHorology's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 21, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | SensorLog | iHorology |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (40 ratings)](https://appshunter.io/ios/app/sensorlog/id388014573/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/ihorology/id1633242134/reviews) |
| Number of ratings | **40** | 4 |
| Positive reviews | **69.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#151** | — |
| Size | 4 MB | 35 MB |
| Requires iOS | 18.0 | **12.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bernd Thomas](https://appshunter.io/developer/385441510) | [Kaizen Writer](https://appshunter.io/developer/1633242376) |

## What reviewers say

### SensorLog

[App page](https://appshunter.io/ios/app/sensorlog/id388014573)

**Currently charting:** #151 Top Paid · Utilities (US App Store)

Record and stream sensor data from your iPhone, iPad, and Apple Watch. Export data in CSV or JSON format, or send it via TCP, UDP, or HTTP requests. Integrates with Core ML models for advanced analysis.

**Highlights:** Log sensor data up to 100Hz, Stream data via TCP/UDP or HTTP, Export data as CSV or JSON, Remote client/server functionality, Siri and Shortcuts integration, Core ML model support, HealthKit data export from Apple Watch

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a Coffee ... | $0.99 | one-time |
| Spend me an Ice Cream ... | $1.99 | one-time |
| Offer me a glas of Wine ... | $5.99 | one-time |
| Invite me for a Cocktail ... | $9.99 | one-time |


### iHorology

[App page](https://appshunter.io/ios/app/ihorology/id1633242134)

This app simulates the functions of a mechanical watch on your phone or tablet. It offers a wide range of features found in real-world timepieces, including chronographs, calendars, and chiming functions. Experience the complexity of mechanical watches with customizable options.

**Highlights:** Chronograph functions (split, flyback, monopusher), Perpetual and annual calendars, Minute repeaters and chiming features, Customizable bezel options, GMT, alarm, and moonphase complications, Power reserve simulation

**In-app purchases:** none


## Frequently asked questions

### Is SensorLog free?

SensorLog costs $2.99, and also offers in-app purchases.

### Is iHorology free?

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

### Which has better reviews, SensorLog or iHorology?

SensorLog is rated higher. SensorLog averages 4.4 out of 5 from 40 ratings, while iHorology averages 4.3 from 4 ratings.

### Do SensorLog or iHorology have ads?

Neither SensorLog nor iHorology shows ads.

### Which is updated more often, SensorLog or iHorology?

SensorLog ships an update every 2 months, and iHorology every 2 months. Most recently, SensorLog was updated on September 21, 2026 and iHorology on July 8, 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.*