555 Calc
Jibiki Works Utilities iPhoneiPadiPod touch
555 Calc is a free Utilities app for iPhone and iPad by Jibiki Works. Rated 4.0/5 from 3 ratings. Requires iOS 11.0. Updated January 2, 2026.
- Rating
- 4.0
- 3 ratings
- Price
- Free
- on the App Store
- Size
- 18 MB
- Age 4+
- Updated
- Jan 2
- 2026 · v1.7
Screenshots
About 555 Calc
This App calculates registors value, when designing the circuit using Timer IC 555. How to (1) Input Frequency value. (2) Input Duty Ratio. (3) Input C1 Value. (4) Touch ‘Calculate’ button. (5) Registors value will be displayed. Note. * Set Duty Ratio to 50 ~ 99. * If you set Duty Ratio to 50, R1 value will be set to 0.
What’s new
Version 1.7 · Updated January 2, 2026
* Support iPad and Mac(Apple Silicon).
App privacy
The developer, Jibiki Works, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data
Used for: Third-Party Advertising
Alternatives to 555 Calc
Looking for apps like 555 Calc? Here are 6 similar apps on the App Store. The highest rated is AVR Tutorial (5.0/5), and all 6 are free to download.
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Timer 555 Calculator
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Capacitor-Converter
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AVR Tutorial
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| 555 Calc | 4.0 / 5 (3 ratings) | Free | January 2, 2026 | |
| Timer 555 Calculator | 3.9 / 5 (8) | Free | May 14, 2025 | Compare |
| Resistor Code Calculators | – | Free | Jul 1, 2026 | Compare |
| Operational Amplifiers Guide | – | Free | Aug 18, 2026 | Compare |
| RC Circuit | 4.8 / 5 (5) | Free | Mar 25, 2024 | Compare |
| Capacitor-Converter | 4.8 / 5 (10) | Free | Jul 29, 2026 | Compare |
| AVR Tutorial | 5.0 / 5 (2) | Free | Mar 26, 2024 | Compare |
Compare 555 Calc with the top alternatives: ratings, updates, ASO score and keyword gaps →