# GridPoint GB vs Spine Guide

The clearest difference is in-app purchases: Spine Guide at none against GridPoint GB's 3. Spine Guide also leads on update cadence (daily vs every 16 months). GridPoint GB's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. GridPoint GB sells 3 one-off in-app purchases. Spine Guide asks for nothing beyond the download.

GridPoint GB ships an update every 16 months, Spine Guide daily. The most recent releases landed on October 23, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | GridPoint GB | Spine Guide |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 72.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 16 months | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 176 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [George MacKerron](https://appshunter.io/developer/314445601) | [Llama Digital](https://appshunter.io/developer/845207062) |

## What reviewers say

### GridPoint GB

[App page](https://appshunter.io/ios/app/gridpoint-gb/id314445598)

Locate yourself on a paper Ordnance Survey map using your iPhone's GPS and compass, even without mobile reception. It provides your grid reference and heading, with accurate coordinate conversions. Features include Apple Watch integration, location sharing, and sunset/sunrise times.

**Highlights:** GPS and compass for location, Accurate coordinate conversions, Apple Watch app and complication, Location sharing, Sunset and sunrise times, Distress signal

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Magnificent tip | $2.99 | one-time |
| Majestic tip | $4.99 | one-time |
| Monumental tip | $8.99 | one-time |


### Spine Guide

[App page](https://appshunter.io/ios/app/spine-guide/id6816046614)

**In-app purchases:** none


## Frequently asked questions

### Is GridPoint GB free?

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

### Is Spine Guide free?

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

### Do GridPoint GB or Spine Guide have ads?

Neither GridPoint GB nor Spine Guide shows ads.

### Which is updated more often, GridPoint GB or Spine Guide?

GridPoint GB ships an update every 16 months, and Spine Guide daily. Most recently, GridPoint GB was updated on October 23, 2026 and Spine Guide on October 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.*