Timer 555 Calculator Pro vs Rifle Shot Timer
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
Rifle Shot Timer
This utility app provides a versatile shot timer for various shooting drills, including single shot, multi-shot, par time, and split time exercises. It offers customizable start delays and optional countdowns with adjustable sensitivity levels.
- Single shot drills
- Multi shot drills
- Par time drills
- Split time drills
- Start delays
- Optional countdown
- Adjustable sensitivity
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- Single shot drills - Multi shot drills - Par time drills - Split time drills - Start delays - Optional countdown - Sensitivity levels and much more. Leave a review with any drills or features you would like to see added!
Screenshots
Verdict
The clearest difference is review sentiment: Timer 555 Calculator Pro at 100% against Rifle Shot Timer's 0%. Timer 555 Calculator Pro also leads on rating (4.7 vs 3.0) and in-app purchases (none vs 1). Rifle Shot Timer's advantage is price (Free vs $0.99) and iOS requirement (11.0 vs 13.2). On ratings volume, 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
Rifle Shot Timer is free to download; Timer 555 Calculator Pro costs $0.99 up front. Rifle Shot Timer sells 1 one-off in-app purchase. Timer 555 Calculator Pro asks for nothing beyond the download.
Timer 555 Calculator Pro holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 100% of Timer 555 Calculator Pro's written reviews are positive against 0% of Rifle Shot Timer's.
Timer 555 Calculator Pro ships an update every 3 months, Rifle Shot Timer every 12 months. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.
| Parameter | Timer 555 Calculator Pro | Rifle Shot Timer |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.7 (3 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 3 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.2 | 11.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Siu Yuen Ho | Daniel Yaakob |
Customer experience
Timer 555 Calculator Pro
Rifle Shot Timer
In-app purchases
Timer 555 Calculator Pro
No in-app purchases
Rifle Shot Timer
- ShotTimer Premium$6.99
Questions
Is Timer 555 Calculator Pro free?
Is Rifle Shot Timer free?
Which has better reviews, Timer 555 Calculator Pro or Rifle Shot Timer?
Do Timer 555 Calculator Pro or Rifle Shot Timer have ads?
Which is updated more often, Timer 555 Calculator Pro or Rifle Shot Timer?
Other comparisons
