The Calculator vs ondot timer|No
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Calculator
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.
- 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
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How many steps does it take to work out a bill? Open the calculator, get a number, write it down somewhere, come back, forget where you were. The notepad lets you write the whole thing as text — every line worked out as you type it: rent = 1200 utilities = 85 rent + utilities 1285 Name your values and reuse them. It reads plain English too: 20 ml in tsp 100 USD in EUR 20% off 80 Also good for - Travelling — convert as you go, the whole day's spending on one page - Cooking — cups, ounces, Fahrenheit, all converted in one place - Estimating materials — add up three walls, divide by coverage per tin - Quoting work — change one number, everything recalculates Three more calculators - Basic — large type, generous spacing, your working shown as you build it - Scientific — trigonometry, logarithms, powers and roots, 2nd key cycles four layers - Convert — 123 units across 15 categories, currency rates update automatically Things you can adjust - Number format — comma, period, space, apostrophe, or none - Decimal places — full precision, or fixed to a number you choose - Appearance — light, dark, true black, or follow the system - Startup page — pick which one opens when you launch the app - Haptics — tune the strength or switch it off Also inside - History, with notes you can attach - Control Centre button for one-tap access - Available in many languages, with unit names and keywords in each Built on minimalist principles Clean design, smooth interaction, no noise — only what actually matters. The Calculator is free to use. Convert and Notepad are Premium features. Terms of Use: https://www.minlsm.com/terms Privacy Policy: https://www.minlsm.com/privacy
ondot timer|No
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.
- 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
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No math. Just enter the time you want it to ring. "I need to leave by 10:50... how many minutes is that?" "I have to get off at 14:51... how long do I have?" You don't need to calculate anymore. ondot timer starts from the time you want it to ring. See both "when it rings" and "time remaining" at a glance. ■ for people who ・Find "how many minutes?" math annoying ・Want to know when the timer rings, not just the countdown ・Don't want to clutter their alarm list ・Want to timebox small tasks by clock time ■ perfect for ・Napping on trains — enter arrival time directly ・"Back by 1:00 PM" lunch break timer ・"Leave the cafe by 3:00" deadline ・Keeping housework from dragging on ■ end time mode — set the exact time to ring "Ring at 14:51." That's it. ■ duration mode — start from minutes "20 minute timer" works too. Shows the exact time it will ring, so you always know when it ends. ■ presets Save your frequent settings. Add a title. One tap to start. ■ Apple Watch Check the countdown on your wrist. Works independently without iPhone. ■ Live Activity Real-time display on Lock Screen and Dynamic Island. Check the timer while using other apps. *Supported devices only Free. No ads. No account required.
Screenshots
Verdict
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.
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. 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.
| Parameter | The Calculator | ondot timer|No |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 83.3% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | YiDe Liu | Momoka Shiramizu |
Customer experience
The Calculator
ondot timer|No
In-app purchases
The Calculator
- Premium$4.991 Month
- Premium$29.991 Year
- Premium$9.99
ondot timer|No
No in-app purchases









