# SOS Viewer vs Plant Tracker with Identifier

The clearest difference is in-app purchases: SOS Viewer at none against Plant Tracker with Identifier's 4. SOS Viewer also leads on update cadence (fortnightly vs every 3 months). Plant Tracker with Identifier's advantage is iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Plant Tracker with Identifier sells 4 in-app purchases, starting at $6.99 per 7 days. SOS Viewer asks for nothing beyond the download.

SOS Viewer ships an update fortnightly, Plant Tracker with Identifier every 3 months. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | SOS Viewer | Plant Tracker with Identifier |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Size | 66 MB | 75 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tech Tree Sdn Bhd](https://appshunter.io/developer/1756843252) | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) |

## What reviewers say

### SOS Viewer

[App page](https://appshunter.io/ios/app/sos-viewer/id6742965163)

**In-app purchases:** none


### Plant Tracker with Identifier

[App page](https://appshunter.io/ios/app/plant-tracker-with-identifier/id6743386577)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pack | $6.99 | per 7 days |
| Monthly Pack | $24.99 | per month |
| Yearly Pack | $59.99 | per year |
| Lifetime Access | $99.99 | one-time |


## Frequently asked questions

### Is SOS Viewer free?

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

### Is Plant Tracker with Identifier free?

Plant Tracker with Identifier is free to download, with in-app purchases available.

### Do SOS Viewer or Plant Tracker with Identifier have ads?

Neither SOS Viewer nor Plant Tracker with Identifier shows ads.

### Which is updated more often, SOS Viewer or Plant Tracker with Identifier?

SOS Viewer ships an update fortnightly, and Plant Tracker with Identifier every 3 months. Most recently, SOS Viewer was updated on October 30, 2026 and Plant Tracker with Identifier on October 15, 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.*