Timer 555 Calculator Pro vs Red stone diamond
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
Red stone diamond
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RedDiamond – Your Ultimate Jewelry & Diamond Management App Discover a seamless way to manage your diamond, color stone, and jewelry stock with RedDiamond! Whether you're a jeweler, trader, or enthusiast, RedDiamond offers an all-in-one platform to track inventory, prices, images, videos, and certificates effortlessly. Key Features: Stock & Price Management – Easily update and track your diamond and jewelry inventory. Image & Video Viewing – Showcase high-quality visuals of your collection. Certificate Management – Store and access certification details anytime. Real-time Updates – Stay informed with the latest price changes and market trends. User-Friendly Interface – Intuitive design for a smooth and efficient experience. Download RedDiamond today and take your jewelry business to the next level!
Screenshots
Verdict
The clearest difference is price: Red stone diamond at Free against Timer 555 Calculator Pro's $0.99. Red stone diamond also leads on update cadence (every 6 weeks vs every 3 months). Timer 555 Calculator Pro's advantage is iOS requirement (13.2 vs 15.6). On 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
Red stone diamond 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, Red stone diamond every 6 weeks. The most recent releases landed on October 23, 2026 and October 28, 2026 respectively.
| Parameter | Timer 555 Calculator Pro | Red stone diamond |
|---|---|---|
| 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 | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.2 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 59 MB |
| Age rating | 4+ | 17+ |
| Developer | Siu Yuen Ho | ATAL PRAKASH SHAH |
In-app purchases
Timer 555 Calculator Pro
No in-app purchases
Red stone diamond
No in-app purchases
Questions
Is Timer 555 Calculator Pro free?
Is Red stone diamond free?
Do Timer 555 Calculator Pro or Red stone diamond have ads?
Which is updated more often, Timer 555 Calculator Pro or Red stone diamond?
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