# Siar vs JMAKeyReader

Siar and JMAKeyReader are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Siar ships an update every 6 weeks, JMAKeyReader every 4 weeks. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Siar | JMAKeyReader |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 14 MB | 26 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TECNOLOGIAS Y SERVICIOS AGRARIOS SA SME MP](https://appshunter.io/developer/1456227300) | [JMA Alejandro Altuna, S.L.U.](https://appshunter.io/developer/1283371844) |

## What reviewers say

### Siar

[App page](https://appshunter.io/ios/app/siar/id1129186499)

This application helps farmers manage irrigation by calculating crop water needs and irrigation doses. It provides daily and weekly irrigation requirements, soil moisture status, and meteorological data. Users can personalize crop management by setting plot location, planting date, irrigation system, and soil type.

**Highlights:** Calculate crop water needs and irrigation doses, Daily and weekly irrigation requirements, Soil moisture status monitoring, Real-time meteorological data, Personalized crop management settings, 5-day weather forecast, Customizable notifications

**Features:** macOS Compatibility

**In-app purchases:** none


### JMAKeyReader

[App page](https://appshunter.io/ios/app/jmakeyreader/id6695739130)

**In-app purchases:** none


## Frequently asked questions

### Is Siar free?

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

### Is JMAKeyReader free?

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

### Do Siar or JMAKeyReader have ads?

Neither Siar nor JMAKeyReader shows ads.

### Which is updated more often, Siar or JMAKeyReader?

Siar ships an update every 6 weeks, and JMAKeyReader every 4 weeks. Most recently, Siar was updated on September 23, 2026 and JMAKeyReader on September 22, 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.*