# Seismometer vs Special Characters++

The clearest difference is rating: Special Characters++ at 3.5 against Seismometer's 3.3. Special Characters++ also leads on price ($0.99 vs $1.99). Seismometer's advantage is review sentiment (65% vs 55%) and iOS requirement (8.0 vs 15.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Seismometer costs $1.99 and Special Characters++ $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Special Characters++ holds the better App Store score, 3.5 against 3.3. Both are backed by a comparable volume of ratings — 17 and 19 respectively. Written reviews complicate that: 65% of Seismometer's written reviews are positive against 55% of Special Characters++'s, so the app with the better star average is not the one people write more warmly about.

Seismometer ships an update every 13 months, Special Characters++ every 7 months. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Seismometer | Special Characters++ |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| Rating | [3.3 (17 ratings)](https://appshunter.io/ios/app/seismometer/id288966259/reviews) | **[3.5 (19 ratings)](https://appshunter.io/ios/app/special-characters-plus-plus/id932623050/reviews)** |
| Number of ratings | 17 | **19** |
| Positive reviews | **64.7% of reviews** | 55.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 7 months** |
| Monetization | **Free** | Paid |
| Size | 3 MB | 2 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FFFF00 Agents AB](https://appshunter.io/developer/288966262) | [James Spencer](https://appshunter.io/developer/356003751) |

## What reviewers say

### Seismometer

[App page](https://appshunter.io/ios/app/seismometer/id288966259)

This app uses your device's accelerometer to detect and measure vibrations, shakes, and movements. It calculates the energy of these movements and displays them on a logarithmic scale, offering various signal filters and recording capabilities.

**Highlights:** Measure vibrations and movements, Uses device accelerometer, Calculates energy of movements, Logarithmic scale display, Signal filters, Recordings and CSV export, UDP Streaming

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Sensitive and accurate
- 👍 Great for demonstrating vibrations
- 👍 Useful for photography and audio
- 👍 Visually appealing
- 👍 Clever use of accelerometer

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Inaccurate readings even on flat surfaces
- 🔋 Drains battery quickly
- 🔒 No security or privacy features
- 👎 Limited functionality and customization

**Reported bugs**

- Crashes when trying to view recordings
- Unresponsive controls
- Incompatible with newer iPhone models
- Screen turns off unexpectedly

**Requested features**

- Pause and scroll back through recordings
- Save and email recorded data
- Adjustable sensitivity settings
- Richter scale or other measurement units
- Ability to record and review vibration history


### Special Characters++

[App page](https://appshunter.io/ios/app/special-characters-plus-plus/id932623050)

Access over 1000 unique symbols, glyphs, and characters not found on the standard iOS keyboard. Organize your favorites and quickly find characters with a dedicated search bar. Enhance your texts, emails, and notes with custom characters.

**Highlights:** Access over 1000 special characters, Categorized character sections, Quick Find search bar, Favorites list for custom sorting, Recently used character tracking, Supports landscape and portrait modes

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

**In-app purchases:** none


## Frequently asked questions

### Is Seismometer free?

Seismometer costs $1.99, with no in-app purchases.

### Is Special Characters++ free?

Special Characters++ costs $0.99, with no in-app purchases.

### Which has better reviews, Seismometer or Special Characters++?

Special Characters++ is rated higher. Seismometer averages 3.3 out of 5 from 17 ratings, while Special Characters++ averages 3.5 from 19 ratings.

### Do Seismometer or Special Characters++ have ads?

Neither Seismometer nor Special Characters++ shows ads.

### Which is updated more often, Seismometer or Special Characters++?

Seismometer ships an update every 13 months, and Special Characters++ every 7 months. Most recently, Seismometer was updated on October 20, 2026 and Special Characters++ on October 8, 2026.

---

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