# Neuralstack Flex vs Silter

The clearest difference is rating: Neuralstack Flex at 5.0 against Silter's 3.3. Neuralstack Flex also leads on in-app purchases (none vs 6). Silter's advantage is iOS requirement (17.0 vs 27.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Silter sells 6 in-app purchases, starting at $4.99 per 7 days. Neuralstack Flex asks for nothing beyond the download.

Neuralstack Flex holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Neuralstack Flex ships an update fortnightly, Silter every 4 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Neuralstack Flex | Silter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/neuralstack-flex/id1580799305/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/silter-sms-spam-blocker/id6466715635/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2.5 GB | 81 MB |
| Requires iOS | 27.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cloud 9 Perception, Inc](https://appshunter.io/developer/1580799877) | [Yusuf Demirci](https://appshunter.io/developer/1668297071) |

## What reviewers say

### Neuralstack Flex

[App page](https://appshunter.io/ios/app/neuralstack-flex/id1580799305)

This AI-powered vision platform digitizes palletized product data using advanced iPhone camera technology. It automates inventory tracking by capturing case counts, reading barcodes, extracting OCR text, and identifying pallet features, eliminating manual data entry.

**Highlights:** AI-based vision platform, Automated palletized product data capture, 2D image and 3D data processing, Case counting and barcode scanning, OCR text extraction and classification, Damage detection and audit trails

**Features:** Vision Pro support

**In-app purchases:** none


### Silter

[App page](https://appshunter.io/ios/app/silter-sms-spam-blocker/id6466715635)

This app uses AI to automatically detect and block unwanted SMS messages, such as scams and ads. It offers country-specific protection and allows users to create custom blocking rules while ensuring complete privacy by processing all data locally on the device.

**Highlights:** AI-powered spam detection, Country and region-based protection, Customizable filter rules, 100% privacy-first, local processing, Ad-free experience, Lightweight and easy to use

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per 7 days |
| Premium | $9.99 | per month |
| Premium Access | $9.99 | per 7 days |
| Premium Access | $9.99 | per 7 days |
| Premium | $19.99 | per year |
| Premium yearly with trial | $49.99 | per year |


## Frequently asked questions

### Is Neuralstack Flex free?

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

### Is Silter free?

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

### Which has better reviews, Neuralstack Flex or Silter?

Neuralstack Flex is rated higher. Neuralstack Flex averages 5.0 out of 5 from 2 ratings, while Silter averages 3.3 from 4 ratings.

### Do Neuralstack Flex or Silter have ads?

Neither Neuralstack Flex nor Silter shows ads.

### Which is updated more often, Neuralstack Flex or Silter?

Neuralstack Flex ships an update fortnightly, and Silter every 4 weeks. Most recently, Neuralstack Flex was updated on October 24, 2026 and Silter on October 25, 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.*