# CISN vs By a Nose

The clearest difference is ads: By a Nose at none against CISN's shown. By a Nose also leads on update cadence (every 2 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CISN ships an update every 4 months, By a Nose every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | CISN | By a Nose |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 52 MB | 32 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BlueFrame Technology, LLC](https://appshunter.io/developer/1115903691) | [Backburner Labs Inc.](https://appshunter.io/developer/1694302364) |

## What reviewers say

### CISN

[App page](https://appshunter.io/ios/app/cisn/id1550595689)

**Features:** macOS Compatibility

**In-app purchases:** none


### By a Nose

[App page](https://appshunter.io/ios/app/by-a-nose/id6450673994)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CISN free?

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

### Is By a Nose free?

By a Nose is free to download, with no in-app purchases.

### Do CISN or By a Nose have ads?

CISN shows ads; By a Nose does not.

### Which is updated more often, CISN or By a Nose?

CISN ships an update every 4 months, and By a Nose every 2 weeks. Most recently, CISN was updated on November 3, 2026 and By a Nose on November 3, 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.*