Timer 555 Calculator Pro vs Bus Connection
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
Bus Connection
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La aplicación proporciona información tanto histórica como en tiempo real sobre los vehículos registrados bajo su cuenta. Accesible desde teléfonos inteligentes o tabletas, este servicio requiere un nombre de usuario y una contraseña para iniciar sesión. Las funciones incluyen: ● Actualizaciones en tiempo real sobre la actividad del vehículo ● Alertas del vehículo ● Recuperación de códigos de error del vehículo ● Filtros basados en requisitos específicos (por ejemplo, vehículos con fallas, vehículos en tránsito, etc.) ● Visualización de vehículos en un mapa o en imágenes satelitales ● Acceso a la información del conductor para cada vehículo asignado ● Visualización de la velocidad, ubicación y dirección del vehículo ● Una lista completa de todos los vehículos y su estado ● Opciones de contacto para obtener explicaciones adicionales y soluciones a problemas ● Recuperación de códigos de error del vehículo ● Filtros basados en requisitos específicos (por ejemplo, vehículos con fallas, vehículos en tránsito, etc.)
Screenshots
Verdict
The clearest difference is price: Bus Connection at Free against Timer 555 Calculator Pro's $0.99. 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
Bus Connection 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.
Timer 555 Calculator Pro ships an update every 3 months, Bus Connection every 4 months. The most recent releases landed on June 4, 2026 and September 13, 2026 respectively.
| Parameter | Timer 555 Calculator Pro | Bus Connection |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 32 MB |
| Age rating | 4+ | 17+ |
| Developer | Siu Yuen Ho | QUESTAR AUTO TECHNOLOGIES LTD |
In-app purchases
Timer 555 Calculator Pro
No in-app purchases
Bus Connection
No in-app purchases
Questions
Is Timer 555 Calculator Pro free?
Is Bus Connection free?
Do Timer 555 Calculator Pro or Bus Connection have ads?
Which is updated more often, Timer 555 Calculator Pro or Bus Connection?
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