# Joylog vs Synth I.A.

The clearest difference is in-app purchases: Joylog at none against Synth I.A.'s 1. Joylog also leads on iOS requirement (10.0 vs 17.0). Synth I.A.'s advantage is update cadence (every 6 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Synth I.A. sells 1 in-app purchase, starting at $4.99 per month. Joylog asks for nothing beyond the download.

Joylog ships an update every 4 months, Synth I.A. every 6 days. The most recent releases landed on September 18, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Joylog | Synth I.A. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/joylog/id1457651013/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 14 MB | 16 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Joylog Tech Co.,Ltd](https://appshunter.io/developer/1457651012) | [Maxime Pontoire](https://appshunter.io/developer/525396222) |

## What reviewers say

### Joylog

[App page](https://appshunter.io/ios/app/joylog/id1457651013)

This app uses a smart sonar system to detect fish location, size, and depth up to 40 meters underwater. It also provides real-time information on underwater topography, water depth, and temperature, displayed on your mobile device.

**Highlights:** High-precision miniature sonar system, Detects fish location, size, and depth, Underwater topographic map generation, Real-time water depth and temperature, Mobile app integration for live data

**Features:** macOS Compatibility

**In-app purchases:** none


### Synth I.A.

[App page](https://appshunter.io/ios/app/synth-ia/id6745096328)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $4.99 | per month |


## Frequently asked questions

### Is Joylog free?

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

### Is Synth I.A. free?

Synth I.A. is free to download, with in-app purchases available.

### Do Joylog or Synth I.A. have ads?

Neither Joylog nor Synth I.A. shows ads.

### Which is updated more often, Joylog or Synth I.A.?

Joylog ships an update every 4 months, and Synth I.A. every 6 days. Most recently, Joylog was updated on September 18, 2026 and Synth I.A. on September 26, 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.*