# TEHLIN NExT vs KnowKnow AI

The clearest difference is in-app purchases: TEHLIN NExT at none against KnowKnow AI's 4. KnowKnow AI's advantage is update cadence (every 3 weeks vs every 23 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. KnowKnow AI sells 4 in-app purchases, starting at $9.99 per month. TEHLIN NExT asks for nothing beyond the download.

TEHLIN NExT ships an update every 23 months, KnowKnow AI every 3 weeks. The most recent releases landed on October 7, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | TEHLIN NExT | KnowKnow AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/knowknow-ai/id6748773796/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 59 MB | 104 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TEH LIN PROSTHETIC & ORTHOPAEDIC INCORPORATED](https://appshunter.io/developer/1725403438) | [RETOWER TECH PTE. LTD.](https://appshunter.io/developer/1827325376) |

## What reviewers say

### TEHLIN NExT

[App page](https://appshunter.io/ios/app/tehlin-next/id6475913564)

**Features:** macOS Compatibility

**In-app purchases:** none


### KnowKnow AI

[App page](https://appshunter.io/ios/app/knowknow-ai/id6748773796)

Effortlessly track your nutrition by simply snapping a photo of your food. This AI-powered tool provides instant analysis of calorie and macronutrient content, helping you understand your dietary intake.

**Highlights:** AI-powered food analysis, Instant calorie and macro breakdown, Photo-based tracking, Nutrition insights

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KnowKnow Plus | $9.99 | per month |
| KnowKnow Pro | $14.99 | per month |
| KnowKnow Plus Yearly | $113.99 | per year |
| KnowKnow Pro Yearly | $178.99 | per year |


## Frequently asked questions

### Is TEHLIN NExT free?

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

### Is KnowKnow AI free?

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

### Do TEHLIN NExT or KnowKnow AI have ads?

Neither TEHLIN NExT nor KnowKnow AI shows ads.

### Which is updated more often, TEHLIN NExT or KnowKnow AI?

TEHLIN NExT ships an update every 23 months, and KnowKnow AI every 3 weeks. Most recently, TEHLIN NExT was updated on October 7, 2026 and KnowKnow AI on October 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.*