Calculator++P vs Interval Voice Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator++P
This utility app simplifies calculations with expression input, one-touch discount and tax calculations, and automatic history saving. It offers a memory function and customizable decimal/punctuation formats for efficient use in everyday scenarios like shopping and estimations.
- Expression-based calculations
- One-touch discount and tax calculation
- Automatic calculation history
- Memory function (M+, M-, MC, MAC)
- Customizable decimal and punctuation formats
- Resumable calculations after interruption
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It is a calculator application which can calculate collectively by expressions like 100+30-50. Discount / premium calculation can be done with one touch. Calculation history is automatically recorded and can be confirmed at any time. You can use it in various scenes of everyday such as shopping, tax calculation, estimate. We emphasize easy-to-use and easy-to-view and it is simple. By using the calculation history, it is released from the trouble of doing the same calculation and taking notes many times. Also, you can reuse historical expressions and answers for calculation, so you can calculate efficiently. On the history screen you can calculate the total of the answers. Expressions are saved every time you enter them, so you can resume calculation immediately after you suspend or end the application. The answers are displayed while you are entering the formula, so you can easily recalculate. Discount calculation such as 20% and 30% discount can be done with one touch. As buttons preset in units of 5%, such as 5%, 10%, 15% are prepared, you can easily calculate. If you use the input box you can also calculate in 1% unit. Moreover, it can calculate with VAT inclusion / VAT exclusion with one touch. Multiple tax rates can be set. If there are multiple tax rates, you can select the tax rate smoothly by touching the calculation button of the tax and then sliding it. A memory key is installed. This allows you to store a totalizer at each break of a calculation and calculate the total value. It can be used conveniently for purchases, for example. 【Usage】 Press the "M +" key to add a sub-meter to the memory Press the "M -" key to subtract the subtotal from the memory Press the "M C" key to delete the last value stored in the memory (memory clear) Press the "M AC" key to delete all the values stored in the memory (memory all clear) If it is not use, you can turn it off from the setting. A mini-game of calculation is carried and you can do a gymnastication of head in idle time etc. [Function introduction] · You can enter expressions and calculate them all together · As with ordinary mathematical expressions, x and ÷ are calculated preferentially · You can calculate using () (You need to make settings on the setting screen in order to display keys) · As the expression becomes longer, the characters become smaller, so you can enter many numbers · You can select the format of the decimal point and punctuation mark 12,345,678.9 (English-speaking countries, Japan, China, etc.) 12.345.678,9 (Germany, Italy, Spain, etc.) 12 345 678,9 (France, Russia, etc.) 1,23,45,678.9 (India etc.) · Even if the application is interrupted or terminated during calculation, the formula at that time is saved, so you can resume calculation immediately · By using the check box on the history screen, you can calculate the total value of answers · Touch the history expression or answer, you can calculate by reusing those values · "00" key is attached · You can correct one character by backspace key · VAT and discount · premium calculation can be done with one touch · You can choose your favorite one from several designs · You can set the key to right-justified or left-justified so that it can be operated with one hand even on a large screen · You can select the number of decimal places to display · It corresponds to the consumption tax reduction tax rate · You can display it sideways on iPad · You can exercise your head with a calculation game
Interval Voice Clock
This app announces the current time at customizable intervals, allowing for hands-free time checks. It offers adjustable volume, voice options, and background playback, functioning entirely offline.
- Customizable announcement intervals
- Adjustable announcement volume
- Choice of male or female voice
- Background playback support
- Offline functionality
- Multiple announcement types
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Signal Time is a simple and easy-to-read app that announces the time at regular intervals. By default, it announces the time every 10 seconds (customizable). Use it in various situations—have it read the time aloud while you're busy getting ready in the morning, or check the time hands-free in the kitchen while waiting for your favorite show to start. No internet connection is required; the app works entirely offline. * Adjust the volume of both the second-hand sound and voice announcements (can be muted) * Set the announcement interval (from every 10 seconds to every hour) * Choose the type of voice used for announcements (female or male) * Supports background playback * Choose the type of announcements (Standard, Simple and Minimal)
Screenshots
Verdict
The clearest difference is update cadence: Interval Voice Clock at every 2 weeks against Calculator++P's every 3 months. Interval Voice Clock also leads on price ($1.99 vs $2.99). Calculator++P's advantage is rating (4.2 vs 4.0) and iOS requirement (13.0 vs 15.0). On review sentiment, ratings volume, ads and in-app purchases 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
Calculator++P costs $2.99 and Interval Voice Clock $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calculator++P holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 67% of Calculator++P's written reviews are positive against 63% of Interval Voice Clock's.
Calculator++P ships an update every 3 months, Interval Voice Clock every 2 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.
| Parameter | Calculator++P | Interval Voice Clock |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | 4.2 (5 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 66.7% of reviews — better | 62.5% of reviews |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 73 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | YUTAKA KENJO | Ryo Okamoto |
Customer experience
Calculator++P
Interval Voice Clock
In-app purchases
Calculator++P
No in-app purchases
Interval Voice Clock
No in-app purchases
Questions
Is Calculator++P free?
Is Interval Voice Clock free?
Which has better reviews, Calculator++P or Interval Voice Clock?
Do Calculator++P or Interval Voice Clock have ads?
Which is updated more often, Calculator++P or Interval Voice Clock?
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