Comparison

Timer 555 Calculator Pro vs TDSS CLOUD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Calculate monostable pulse width
  • Calculate astable frequency
  • Find component combinations
  • Adjust component tolerance
  • Unlimited combinations (Pro)
  • Share circuit files
Read full description

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

About

TDSS CLOUD

Features
Read full description

Monitor your TDSS cameras in real time or review past events and archives. TDSS Cloud Video Surveillance and Analytics is an end-to-end video surveillance solution. Leveraging plug-and-play cameras to monitor your business and cloud storage and analytics. TDSS CLOUD provides end-to-end solutions from single location businesses with few cameras to businesses with several cameras across multiple locations. Video is transmitted to the cloud using bank-grade encryption where it’s then processed using machine learning to detect objects such as people and vehicles. Event rules based on time schedules and object types can trigger notifications to be sent to mobile phones, email, or our video monitoring station.

Screenshots

Timer 555 Calculator Pro4 screens
TDSS CLOUD4 screens

Verdict

The call

The clearest difference is price: TDSS CLOUD at Free against Timer 555 Calculator Pro's $0.99. TDSS CLOUD also leads on iOS requirement (11.0 vs 13.2). 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

CostPrice · In-app purchases · Ads · Monetization

TDSS CLOUD 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.

UpkeepUpdate frequency

Timer 555 Calculator Pro ships an update every 3 months, TDSS CLOUD every 4 months. The most recent releases landed on June 4, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 8 level
Timer 555 Calculator Pro versus TDSS CLOUD: the parameters behind the verdict, then further details
ParameterTimer 555 Calculator ProTDSS CLOUD
Price$0.99Free — better
Rating4.7 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.211.0 — better
Further details — not scored
Size3 MB31 MB
Age rating4+4+
DeveloperSiu Yuen HoHappy Mansion LLC

In-app purchases

None

Timer 555 Calculator Pro

No in-app purchases

None

TDSS CLOUD

No in-app purchases

Questions

Is Timer 555 Calculator Pro free?
Timer 555 Calculator Pro costs $0.99, with no in-app purchases.
Is TDSS CLOUD free?
TDSS CLOUD is free to download, with no in-app purchases.
Do Timer 555 Calculator Pro or TDSS CLOUD have ads?
Neither Timer 555 Calculator Pro nor TDSS CLOUD shows ads.
Which is updated more often, Timer 555 Calculator Pro or TDSS CLOUD?
Timer 555 Calculator Pro ships an update every 3 months, and TDSS CLOUD every 4 months. Most recently, Timer 555 Calculator Pro was updated on June 4, 2026 and TDSS CLOUD on September 22, 2026.

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