# Fill CORE vs ISNT

The clearest difference is iOS requirement: ISNT at 11.0 against Fill CORE's 15.0. On price, update cadence, 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.

Fill CORE ships an update fortnightly, ISNT weekly. The most recent releases landed on September 25, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Fill CORE | ISNT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Size | 94 MB | 34 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CORE smartwork GmbH](https://appshunter.io/developer/921565741) | [Aarvy Technologies](https://appshunter.io/developer/1558833450) |

## What reviewers say

### Fill CORE

[App page](https://appshunter.io/ios/app/fill-core/id6468472545)

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

**In-app purchases:** none


### ISNT

[App page](https://appshunter.io/ios/app/isnt/id6470020118)

**In-app purchases:** none


## Frequently asked questions

### Is Fill CORE free?

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

### Is ISNT free?

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

### Do Fill CORE or ISNT have ads?

Neither Fill CORE nor ISNT shows ads.

### Which is updated more often, Fill CORE or ISNT?

Fill CORE ships an update fortnightly, and ISNT weekly. Most recently, Fill CORE was updated on September 25, 2026 and ISNT on September 11, 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.*