# The Calculator vs ondot timer｜No

The clearest difference is in-app purchases: ondot timer｜No at none against The Calculator's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. The Calculator sells 3 in-app purchases, starting at $4.99 per month. ondot timer｜No asks for nothing beyond the download.

The Calculator ships an update every 6 days, ondot timer｜No every 3 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | The Calculator | ondot timer｜No |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-calculator-notes-and-units/id6745772251/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 days | **Every 3 days** |
| Monetization | Freemium | **Free** |
| Size | 17 MB | 3 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [YiDe Liu](https://appshunter.io/developer/1813803093) | [Momoka Shiramizu](https://appshunter.io/developer/1880005033) |

## What reviewers say

### The Calculator

[App page](https://appshunter.io/ios/app/the-calculator-notes-and-units/id6745772251)

This app combines a powerful calculator with a note-taking feature, allowing you to document calculations as you perform them. It also offers unit and currency conversions, with customizable appearance and settings.

**Highlights:** Integrated notepad for documenting calculations, Unit and currency conversion, Basic, scientific, and conversion calculators, Customizable appearance (light, dark, black), Adjustable number formats and decimal places, History with attachable notes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| Premium | $29.99 | per year |
| Premium | $9.99 | one-time |


### ondot timer｜No

[App page](https://appshunter.io/ios/app/ondot-timerno-math-timer/id6762602662)

This app eliminates the need for time calculations by allowing you to set timers based on a desired end time or duration. It displays both the ringing time and remaining time at a glance, perfect for tasks and deadlines.

**Highlights:** Set timers by desired end time, Set timers by duration, See ringing time and time remaining, Save frequent timer presets, Apple Watch integration, Live Activity on Lock Screen/Dynamic Island

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is The Calculator free?

The Calculator is free to download, with in-app purchases available.

### Is ondot timer｜No free?

ondot timer｜No is free to download, with no in-app purchases.

### Do The Calculator or ondot timer｜No have ads?

Neither The Calculator nor ondot timer｜No shows ads.

### Which is updated more often, The Calculator or ondot timer｜No?

The Calculator ships an update every 6 days, and ondot timer｜No every 3 days. Most recently, The Calculator was updated on October 24, 2026 and ondot timer｜No on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*