# TimeKey vs ExSciCalc

The clearest difference is price: TimeKey at Free against ExSciCalc's $1.99. TimeKey also leads on ratings volume (3 vs 1). ExSciCalc's advantage is rating (5.0 vs 3.7) and in-app purchases (none vs 2). On update cadence, device support and iOS requirement there is nothing between them.

TimeKey is free to download; ExSciCalc costs $1.99 up front. TimeKey sells 2 in-app purchases, starting at $1.49 per month. ExSciCalc asks for nothing beyond the download.

ExSciCalc holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

TimeKey ships an update every 6 weeks, ExSciCalc every 3 weeks. The most recent releases landed on September 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | TimeKey | ExSciCalc |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/timekey/id1506129753/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/exscicalc/id1625177287/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 55 MB | 1 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naoki Chiba](https://appshunter.io/developer/1506129752) | [Dale C Koepp](https://appshunter.io/developer/331525420) |

## What reviewers say

### TimeKey

[App page](https://appshunter.io/ios/app/timekey/id1506129753)

This app generates secure Time-based One-Time Passwords (TOTP) for two-factor authentication, protecting your online accounts. It offers local data storage, biometric security, and an intuitive interface for easy account management and quick code access. No internet connection is needed for code generation.

**Highlights:** Generate secure TOTP codes, Import accounts via QR code or manual entry, Organize accounts with categories and favorites, Biometric authentication (Face ID/Touch ID), Passcode protection, Dark mode support, Export QR codes for backup

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 month | $1.49 | per month |
| Premium 1 year | $13.49 | per year |


### ExSciCalc

[App page](https://appshunter.io/ios/app/exscicalc/id1625177287)

This calculator offers enhanced precision and memory beyond standard devices. It includes advanced functions for statistics, physics, and mathematics, alongside common calculations and unit conversions.

**Highlights:** Extended precision (30+ digits), Extended memory (main + 10 auxiliary), Scroll windows for button access, Statistical calculations, Physical and mathematical constants, Unit conversions, Roots of equations, Special relativity calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TimeKey free?

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

### Is ExSciCalc free?

ExSciCalc costs $1.99, with no in-app purchases.

### Which has better reviews, TimeKey or ExSciCalc?

ExSciCalc is rated higher. TimeKey averages 3.7 out of 5 from 3 ratings, while ExSciCalc averages 5.0 from 1 ratings.

### Do TimeKey or ExSciCalc have ads?

TimeKey shows ads; ExSciCalc does not.

### Which is updated more often, TimeKey or ExSciCalc?

TimeKey ships an update every 6 weeks, and ExSciCalc every 3 weeks. Most recently, TimeKey was updated on September 15, 2026 and ExSciCalc on October 2, 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.*