# Calculator T vs Time Notes

The clearest difference is update cadence: Calculator T at every 2 days against Time Notes's every 3 months. Calculator T also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calculator T ships an update every 2 days, Time Notes every 3 months. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Calculator T | Time Notes |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 3 months |
| Monetization | Free | — |
| Size | 16 MB | 9 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Xiao Hou Yi Sheng Traditional Chinese Medicine Technology (Shenzhen) Co., Ltd](https://appshunter.io/developer/1524258136) | [FENGHUI (HK) HOLDINGS LIMITED](https://appshunter.io/developer/1722133514) |

## What reviewers say

### Calculator T

[App page](https://appshunter.io/ios/app/calculator-t/id6473983653)

This app offers advanced scientific calculation and unit conversion capabilities. It features a history tape, memory functions, and supports complex mathematical operations. It also includes currency exchange rates and a wide range of measurement conversions.

**Highlights:** Standard and scientific function modes, Extensive unit conversion (over 300 units), History tape for last 100 records, Memory buttons (MS, M+, M-, MR, MC), Copy/paste functionality for equations and results, Support for large number calculations and scientific notation, Currency exchange rate conversion

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

**In-app purchases:** none


### Time Notes

[App page](https://appshunter.io/ios/app/time-notes-diary-with-lock/id6748808941)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calculator T free?

Calculator T is free to download, with no in-app purchases.

### Is Time Notes free?

Time Notes is free to download, with no in-app purchases.

### Do Calculator T or Time Notes have ads?

Neither Calculator T nor Time Notes shows ads.

### Which is updated more often, Calculator T or Time Notes?

Calculator T ships an update every 2 days, and Time Notes every 3 months. Most recently, Calculator T was updated on November 4, 2026 and Time Notes on November 8, 2026.

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