# Koslan vs ORTH

The clearest difference is in-app purchases: Koslan at none against ORTH's 6. ORTH's advantage is update cadence (every 6 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ORTH sells 6 in-app purchases, starting at $20.00 per month. Koslan asks for nothing beyond the download.

Koslan ships an update monthly, ORTH every 6 days. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Koslan | ORTH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/orth/id6754557886/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | — | Freemium |
| Size | 65 MB | 107 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Desarrollo Web SPA](https://appshunter.io/developer/1587233686) | [Aydi Technologies](https://appshunter.io/developer/1848853522) |

## What reviewers say

### Koslan

[App page](https://appshunter.io/ios/app/koslan/id1637106895)

**In-app purchases:** none


### ORTH

[App page](https://appshunter.io/ios/app/orth/id6754557886)

This AI-powered assistant provides real-time, context-aware agronomy insights for growers. Get instant answers to farming questions, receive proactive risk alerts, and ensure export compliance. It learns from your land to help you reduce costs and increase yields.

**Highlights:** Real-time field insights, Instant agronomy answers, Proactive risk alerts, Export compliance, Continuous learning, Reduced input costs, Increased yields

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Orth Plus - Monthly | $20.00 | per month |
| Field Pro Monthly | $59.99 | per month |
| Orth Plus - Yearly | $200.00 | per year |
| Field Expert Monthly | $200.00 | per month |
| Field Pro Yearly | $600.00 | per year |
| Field Expert Yearly | $1000.00 | per year |


## Frequently asked questions

### Is Koslan free?

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

### Is ORTH free?

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

### Do Koslan or ORTH have ads?

Neither Koslan nor ORTH shows ads.

### Which is updated more often, Koslan or ORTH?

Koslan ships an update monthly, and ORTH every 6 days. Most recently, Koslan was updated on October 2, 2026 and ORTH on October 16, 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.*