# Fish Mapping vs On My Marks

The clearest difference is review sentiment: On My Marks at 100% against Fish Mapping's 50%. On My Marks also leads on rating (5.0 vs 3.7). Fish Mapping's advantage is in-app purchases (none vs 1) and iOS requirement (13.4 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. On My Marks sells 1 in-app purchase, starting at $49.99 per year. Fish Mapping asks for nothing beyond the download.

On My Marks holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 50% of Fish Mapping's written reviews are positive against 100% of On My Marks's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Fish Mapping | On My Marks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/fish-mapping/id6450968706/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/on-my-marks/id6737274150/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 57 MB | 73 MB |
| Requires iOS | **13.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [OceanBytes Holding LLC](https://appshunter.io/developer/1686599948) | [On My Marks, LLC](https://appshunter.io/developer/1775694456) |

## What reviewers say

### Fish Mapping

[App page](https://appshunter.io/ios/app/fish-mapping/id6450968706)

This app provides detailed fishing recommendations and environmental data to help anglers find the best spots for bait and game fish. It displays information like plankton strength, sea surface temperature, and ocean currents to optimize fishing trips.

**Highlights:** Fishing Recommendations, Weed Lines, Plankton Front Strength, Sea Surface Temperature, Sub-Surface Temperatures, Sea Surface Height Anomalies, Ocean Currents

**Features:** macOS Compatibility

**In-app purchases:** none


### On My Marks

[App page](https://appshunter.io/ios/app/on-my-marks/id6737274150)

Organize and manage your GPS waypoints from various devices and software. Easily import, edit, merge, and export your marks to declutter and streamline your navigation data for fishing, boating, diving, and outdoor exploration.

**Highlights:** Import GPS waypoints, Edit waypoint data, Merge duplicate waypoints, Export waypoint data, Supports Garmin Active Captain, Supports Simrad, C-Map, Lowrance

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $49.99 | per year |


## Frequently asked questions

### Is Fish Mapping free?

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

### Is On My Marks free?

On My Marks is free to download, with in-app purchases available.

### Which has better reviews, Fish Mapping or On My Marks?

On My Marks is rated higher. Fish Mapping averages 3.7 out of 5 from 3 ratings, while On My Marks averages 5.0 from 2 ratings.

### Do Fish Mapping or On My Marks have ads?

Neither Fish Mapping nor On My Marks shows ads.

### Which is updated more often, Fish Mapping or On My Marks?

Fish Mapping ships an update every 3 weeks, and On My Marks every 3 weeks. Most recently, Fish Mapping was updated on September 9, 2026 and On My Marks on September 13, 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.*