# Strobe Light Tachometer vs iHP48

The clearest difference is rating: iHP48 at 4.7 against Strobe Light Tachometer's 4.2. iHP48 also leads on update cadence (monthly vs every 7 months) and review sentiment (88% vs 63%). Strobe Light Tachometer's advantage is iOS requirement (7.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iHP48 holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 277 and 270 respectively. Written reviews point the same way: 63% of Strobe Light Tachometer's written reviews are positive against 88% of iHP48's.

Strobe Light Tachometer ships an update every 7 months, iHP48 monthly. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Strobe Light Tachometer | iHP48 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (277 ratings)](https://appshunter.io/ios/app/strobe-light-tachometer/id978182913/reviews) | **[4.7 (270 ratings)](https://appshunter.io/ios/app/ihp48/id1549608953/reviews)** |
| Number of ratings | **277** | 270 |
| Positive reviews | 63.2% of reviews | **88.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | Free | Free |
| Size | 4 MB | 6 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Motionics LLC](https://appshunter.io/developer/424498959) | [Alexis Lorca](https://appshunter.io/developer/1549608955) |

## What reviewers say

### Strobe Light Tachometer

[App page](https://appshunter.io/ios/app/strobe-light-tachometer/id978182913)

Transform your iPhone into a powerful strobe light and tachometer. Precisely control flashing speeds from 1Hz to 130Hz to measure the RPM of rotating objects by making them appear stationary. Ideal for precise speed measurements in dark environments.

**Highlights:** Adjustable strobe speed (1-130Hz / 60-7800RPM), Quick adjustment buttons (x2, ÷2), Fine-tuning buttons for precise speed, Manual RPM input, Display speed in Hz and RPM, Light/dark background option

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✅ Accurate frequency and RPM measurements
- 👍 Simple and user-friendly interface
- 🎓 Excellent educational tool for teaching frequency concepts
- 💰 Free application
- ⚡ Quick and easy to use, even one-handed

**What reviewers complain about**

- 💡 LED flash brightness is too dim
- 🐛 Strobe light cuts out or blacks out intermittently
- 🐛 Inconsistent and erratic flashing patterns
- ⚠️ Hardware compatibility issues with older iPhone models
- 🐛 Strobe stops working after extended use

**Reported bugs**

- Strobe light cuts out every 2-3 seconds then resumes
- LED flashes erratically on certain iPhone models (iPhone 14, iPhone XS, iPhone SE)
- Strobe pulse is inconsistent and misses beats
- App crashes or stops working after 20-30 minutes
- Requires manual LED activation before starting strobe

**Requested features**

- Ability to adjust brightness while strobe is running
- Display accuracy specifications and hardware limitations
- Option to set frequency by Hz in addition to RPM
- Ability to specify number of fan blades for accurate RPM calculation
- 2x and 1/2x multiplier options


### iHP48

[App page](https://appshunter.io/ios/app/ihp48/id1549608953)

This app brings the powerful HP48 calculator experience to your mobile device. It offers enhanced performance, seamless file management, and a customizable interface with support for various HP calculator models. Enjoy a familiar and convenient calculator solution without needing extra hardware.

**Highlights:** Supports HP38, HP39, HP48, HP49, HP50 calculators, Haptic feedback and customizable zoom options, Seamless file transfer via iTunes and Files app, Cloud storage integration (iCloud, OneDrive, Dropbox), Object saving/loading and copy/paste functionality, Access to calculator packages, skins, and ROMs, Internal file manager and extensible settings

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent emulation of HP48
- 👍 Familiar and nostalgic feel
- 👍 Comprehensive functionality
- 👍 Customizable skins
- 👍 Haptic feedback

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Missed keystrokes when typing quickly
- 🐛 Blank or flickering display
- 🐛 Compatibility issues with newer iOS versions

**Reported bugs**

- Crashes on startup
- Inability to save state across sessions
- Incompatibility with certain iOS devices

**Requested features**

- Dark mode option
- Ability to disable haptic feedback
- Support for HP50G emulation
- Improved keyboard mapping and arrow key functionality


## Frequently asked questions

### Is Strobe Light Tachometer free?

Strobe Light Tachometer is free to download, with no in-app purchases.

### Is iHP48 free?

iHP48 is free to download, with no in-app purchases.

### Which has better reviews, Strobe Light Tachometer or iHP48?

iHP48 is rated higher. Strobe Light Tachometer averages 4.2 out of 5 from 277 ratings, while iHP48 averages 4.7 from 270 ratings.

### Do Strobe Light Tachometer or iHP48 have ads?

Neither Strobe Light Tachometer nor iHP48 shows ads.

### Which is updated more often, Strobe Light Tachometer or iHP48?

Strobe Light Tachometer ships an update every 7 months, and iHP48 monthly. Most recently, Strobe Light Tachometer was updated on September 22, 2026 and iHP48 on September 19, 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.*