Timer 555 Calculator Pro vs ContiConnect Installer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timer 555 Calculator Pro
Calculate parameters for monostable and astable circuits. Find component combinations for desired pulse width or frequency. Share circuit files via iCloud Drive or AirDrop.
- Calculate monostable pulse width
- Calculate astable frequency
- Find component combinations
- Adjust component tolerance
- Unlimited combinations (Pro)
- Share circuit files
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This app is used to calculate monostable and astable circuit. Features * Calculate pulse width of monostable circuit * Calculate frequency of astable circuit * Find out combination of components making a desire pulse width in monostable circuit * Find out combination of components making a desire frequency in astable circuit * Share file to iCloud Drive (For iOS8 or later) * Share file via AirDrop Additional Features in the Professional Edition * Unlimited number of combinations * Allow to change tolerance * No ads
ContiConnect Installer
This app facilitates the activation, checking, and testing of connected vehicle units. It allows for system updates and provides a way to verify installation and reception quality.
- Activate units by scanning serial numbers
- Read sensor data
- Verify unit connections
- Perform test drives for reception quality
- Update system configurations
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ACTIVATE You can easily activate your units: Scan the serial number and activate them promptly. You can also read out sensors. CHECK After installation check if everything worked correctly and whether the units are properly connected. TEST You can also do a test drive and proof the reception quality of the system. MODIFY Update your system in case you add or remove Enabler Units. If you are interested in more information about Continental´s digital solutions visit: continental-digital-solutions.com *requires ContiConnect Account and either In-Cabin Unit or Trailer Unit
Screenshots
Verdict
The clearest difference is price: ContiConnect Installer at Free against Timer 555 Calculator Pro's $0.99. ContiConnect Installer also leads on rating (5.0 vs 4.7). Timer 555 Calculator Pro's advantage is ratings volume (3 vs 1). On update cadence, ads, in-app purchases 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
ContiConnect Installer is free to download; Timer 555 Calculator Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ContiConnect Installer holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Timer 555 Calculator Pro ships an update every 3 months, ContiConnect Installer every 5 months. The most recent releases landed on June 4, 2026 and June 6, 2026 respectively.
| Parameter | Timer 555 Calculator Pro | ContiConnect Installer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 38 MB |
| Age rating | 4+ | 17+ |
| Developer | Siu Yuen Ho | QUESTAR AUTO TECHNOLOGIES LTD |
Customer experience
Timer 555 Calculator Pro
ContiConnect Installer
In-app purchases
Timer 555 Calculator Pro
No in-app purchases
ContiConnect Installer
No in-app purchases
Questions
Is Timer 555 Calculator Pro free?
Is ContiConnect Installer free?
Which has better reviews, Timer 555 Calculator Pro or ContiConnect Installer?
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