# Calctan vs Chronographer

The clearest difference is rating: Calctan at 4.5 against Chronographer's 3.4. Calctan also leads on ratings volume (61 vs 5) and iOS requirement (16.6 vs 18.6). Chronographer's advantage is in-app purchases (none vs 1) and review sentiment (50% vs 29%). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Calctan sells 1 one-off in-app purchase. Chronographer asks for nothing beyond the download.

Calctan holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: Calctan has 61 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 29% of Calctan's written reviews are positive against 50% of Chronographer's, so the app with the better star average is not the one people write more warmly about.

Calctan ships an update every 3 months, Chronographer every 2 months. The most recent releases landed on October 29, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Calctan | Chronographer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (61 ratings)](https://appshunter.io/ios/app/calctan/id1445480535/reviews)** | [3.4 (5 ratings)](https://appshunter.io/ios/app/chronographer/id6448242917/reviews) |
| Number of ratings | **61** | 5 |
| Positive reviews | 28.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 8 MB | 3 MB |
| Requires iOS | **16.6** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Lozada](https://appshunter.io/developer/421852863) | [Robert France](https://appshunter.io/developer/1684138105) |

## What reviewers say

### Calctan

[App page](https://appshunter.io/ios/app/calctan/id1445480535)

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

**Highlights:** Smart formula workspace with direct cursor editing, Advanced scientific engine with true order of operations, Auditable calculation history on a digital tape, Exportable reports via AirPrint and PDF, Multitasking support for iPad, iCloud synchronization across devices, Private and ad-free experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.99 | one-time |


### Chronographer

[App page](https://appshunter.io/ios/app/chronographer/id6448242917)

This app helps you meticulously track the accuracy of your mechanical watches. It records time differences, calculates detailed performance metrics, and visualizes trends with charts and histograms. You can also manage your watch collection, log daily wear, and analyze positional variations.

**Highlights:** Track mechanical watch accuracy, Calculate detailed performance metrics, Visualize accuracy with charts and histograms, Manage watch collection with notes and photos, Log daily watch wear, Analyze positional variation, Export watch data

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

**In-app purchases:** none


## Frequently asked questions

### Is Calctan free?

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

### Is Chronographer free?

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

### Which has better reviews, Calctan or Chronographer?

Calctan is rated higher. Calctan averages 4.5 out of 5 from 61 ratings, while Chronographer averages 3.4 from 5 ratings.

### Do Calctan or Chronographer have ads?

Neither Calctan nor Chronographer shows ads.

### Which is updated more often, Calctan or Chronographer?

Calctan ships an update every 3 months, and Chronographer every 2 months. Most recently, Calctan was updated on October 29, 2026 and Chronographer on October 15, 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.*