# Calclin vs Echo

The clearest difference is price: Calclin at Free against Echo's $6.99. Echo's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

Calclin is free to download; Echo costs $6.99 up front. Calclin sells 2 one-off in-app purchases. Echo asks for nothing beyond the download.

Calclin ships an update every 2 months, Echo every 5 days. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calclin | Echo |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/calclin/id385216637/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 9 MB | 16 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Azukid.com](https://appshunter.io/developer/354937951) | [Umi Indigo LLC](https://appshunter.io/developer/1679236790) |

## What reviewers say

### Calclin

[App page](https://appshunter.io/ios/app/calclin/id385216637)

This calculator app provides a paper-roll style history for easy review of calculations. It supports formula input, notes for results, and multiple calculation frames to organize different tasks. Users can customize display modes and appearance.

**Highlights:** Paper-roll style calculation history, Multiple calculation frames, Formula input with parentheses and functions, Notes for calculation results, PDF export, Customizable digit grouping, separators, and rounding, Auto, Light, and Dark appearance modes

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tips_1 | $0.99 | one-time |
| Tips_5 | $4.99 | one-time |


### Echo

[App page](https://appshunter.io/ios/app/echo-ai/id6741455864)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calclin free?

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

### Is Echo free?

Echo costs $6.99, with no in-app purchases.

### Do Calclin or Echo have ads?

Neither Calclin nor Echo shows ads.

### Which is updated more often, Calclin or Echo?

Calclin ships an update every 2 months, and Echo every 5 days. Most recently, Calclin was updated on October 15, 2026 and Echo on October 7, 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.*