Calculator⁻ vs Ruler msg
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator⁻
A straightforward calculator app designed for simplicity, offering basic arithmetic operations and percentage calculations. It allows users to record and recall past results, customize colors, and enable touch sounds for a personalized experience.
- Basic arithmetic operations
- Percentage calculations
- Record and recall results
- Customizable colors
- Touch sound option
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It is a simple and easy calculator. It is a simple calculator with no complex functions at all. Features: Addition, subtraction, multiplication, division, percent operation Recording and recalling calculation results The numbers, operators, parentheses, results Custom colors Use touch sound Very useful for school children
Ruler msg
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Ruler 定規 measuring 物の長さを測れます。ヤードとメトリックの２種類あります。デザインも変えられます。 You can measure the length of an object. There are two types: yard and metric. The design can be changed.
Screenshots
Verdict
The clearest difference is ads: Ruler msg at none against Calculator⁻'s shown. Calculator⁻'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.1). On price, update cadence 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Calculator⁻ ships an update every 2 months, Ruler msg every 5 weeks. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.
| Parameter | Calculator⁻ | Ruler msg |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (3.6K ratings) — better | — |
| Positive reviews | 52.0% of reviews | — |
| Number of ratings | 3.6K — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | UniCom Technology | kenshin miyamoto |
Bugs and requests
Calculator⁻
Reported bugs
3 issues- Decimal point problem: .5 becomes 5
- Button that should be 7 shows as 9 and gives 9 when used
- Percentage button does not work correctly
Requested features
3 requests- Backspace button
- Percentage button that works properly
- Arrange buttons in standard calculator layout
Ruler msg
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator⁻
No in-app purchases
Ruler msg
No in-app purchases
