Seismometer vs AddressBook/Contacts Manager
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Seismometer
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.
- Measure vibrations and movements
- Uses device accelerometer
- Calculates energy of movements
- Logarithmic scale display
- Signal filters
- Recordings and CSV export
- UDP Streaming
Read full descriptionHide full description
Measure everything that vibrates, shakes or moves. Or why not an actual earthquake? Seismometer uses your iPhone's built in accelerometer to measure movements in two axes, calculate the resulting energy and draw the results on a rolling logarithmic scale. Features: * Different signal filters * Highly configurable * Recordings * CSV exporting of recordings * UDP Streaming http://yellowagents.com/seismometer/ for more info and examples of how to use the streaming protocol.
AddressBook/Contacts Manager
Effortlessly manage your contacts with automatic backups, smart duplicate detection, and secure storage. Import from various sources and restore from multiple backups. This app works offline and prioritizes your privacy.
- Automatic Backup
- Smart Duplicate Detection & Merging
- Compare & Restore from Multiple Backups
- Import from Google/Yahoo/CSV/VCF
- Clean Incomplete Contacts
- Secure Storage
- Offline Functionality
Read full descriptionHide full description
Features Automatic Backup Smart Duplicate Detection & Merging Compare & Restore from Multiple Backups Import from Google/Yahoo/CSV/VCF Clean Incomplete Contacts Secure Storage Perfect for users who: Switch between devices Want to clean up messy contact lists Need reliable backup solutions Import contacts from multiple sources Privacy-focused: Your data stays on your device Works offline
Screenshots
Verdict
The clearest difference is price: AddressBook/Contacts Manager at Free against Seismometer's $1.99. AddressBook/Contacts Manager also leads on rating (5.0 vs 3.3) and update cadence (every 5 days vs every 13 months). Seismometer's advantage is in-app purchases (none vs 2) and ratings volume (17 vs 1). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
AddressBook/Contacts Manager is free to download; Seismometer costs $1.99 up front. AddressBook/Contacts Manager sells 2 in-app purchases, starting at $0.99 per 7 days. Seismometer asks for nothing beyond the download.
AddressBook/Contacts Manager holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Seismometer has 17 ratings behind it against 1, so its average is the more settled of the two.
Seismometer ships an update every 13 months, AddressBook/Contacts Manager every 5 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.
| Parameter | Seismometer | AddressBook/Contacts Manager |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.3 (17 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 64.7% of reviews | — |
| Number of ratings | 17 — better | 1 |
| Update frequency | Every 13 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | FFFF00 Agents AB | Langtian Du |
Customer experience
Seismometer
AddressBook/Contacts Manager
Bugs and requests
Seismometer
Reported bugs
4 issues- Crashes when trying to view recordings
- Unresponsive controls
- Incompatible with newer iPhone models
- Screen turns off unexpectedly
Requested features
5 requests- 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
AddressBook/Contacts Manager
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Seismometer
No in-app purchases
AddressBook/Contacts Manager
- AddressBookManager Weekly$0.997 Days
- AddressBookManager one year license$1.991 Year
Questions
Is Seismometer free?
Is AddressBook/Contacts Manager free?
Which has better reviews, Seismometer or AddressBook/Contacts Manager?
Do Seismometer or AddressBook/Contacts Manager have ads?
Which is updated more often, Seismometer or AddressBook/Contacts Manager?
Other comparisons
