CalcFormula vs VoiceTimeSignal
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
CalcFormula
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CalcFormula is a formula calculator designed for study and work. It helps you save frequently used expressions, reuse them anytime, and reduce repetitive typing and recalculation. Create and manage your own formula entries, then input variable values to get results instantly. For complex expressions, CalcFormula provides clear formula display and editing so you can verify structure and avoid input mistakes. Whether you are reviewing for school, doing engineering conversions, making financial estimates, or handling daily repeated calculations, CalcFormula helps you build a reusable personal formula library. Key Features: Formula Management: Create, edit, and delete formulas in one place Variable Input: Enter parameter values and calculate in real time Formula Display: Readable rendered formula preview Common Formula Library: Built-in references for quick access Local Data: Your formulas are stored locally on your device
VoiceTimeSignal
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The time will be announced by voice. *The voice tone, reading tone, etc. are changeable.
Screenshots
Verdict
The clearest difference is in-app purchases: VoiceTimeSignal at none against CalcFormula's 1. VoiceTimeSignal also leads on iOS requirement (15.8.3 vs 26.0). CalcFormula's advantage is ads (none vs shown). On price and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. CalcFormula sells 1 one-off in-app purchase. VoiceTimeSignal asks for nothing beyond the download.
| Parameter | CalcFormula | VoiceTimeSignal |
|---|---|---|
| Price | Free | Free |
| Update frequency | โ | Every 2 weeks |
| Ads | No โ better | Yes |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 26.0 | 15.8.3 โ better |
| Further details โ not scored | ||
| Size | 16 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | ไปฒ่พพ ๅค | Hideaki Uchikoshi |
In-app purchases
CalcFormula
- CalcFormula PRO$0.99
VoiceTimeSignal
No in-app purchases
Questions
Is CalcFormula free?
Is VoiceTimeSignal free?
Do CalcFormula or VoiceTimeSignal have ads?
Other comparisons
