# GRIDFALL vs Ocean Defense TD

The clearest difference is price: Ocean Defense TD at Free against GRIDFALL's $3.99. Ocean Defense TD also leads on in-app purchases (none vs 1) and update cadence (daily vs every 4 months). GRIDFALL's advantage is ads (none vs shown).

Ocean Defense TD is free to download; GRIDFALL costs $3.99 up front. GRIDFALL sells 1 one-off in-app purchase. Ocean Defense TD asks for nothing beyond the download.

GRIDFALL ships an update every 4 months, Ocean Defense TD daily. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | GRIDFALL | Ocean Defense TD |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ocean-defense-td/id6760538884/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Daily** |
| Monetization | — | Ad-supported |
| Size | 56 MB | 99 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 9+ | 12+ |
| Developer | [Mirhad Rama](https://appshunter.io/developer/1511968739) | [MARK GABRIEL VAN DER POEL](https://appshunter.io/developer/1884858357) |

## What reviewers say

### GRIDFALL

[App page](https://appshunter.io/ios/app/gridfall/id6758910467)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $3.99 | one-time |


### Ocean Defense TD

[App page](https://appshunter.io/ios/app/ocean-defense-td/id6760538884)

Defend your underwater coral reef from waves of human invaders in this fast-paced tower defense game. Deploy fish soldiers, strategically choose powerful upgrades each run, and unlock permanent enhancements to survive endless enemy assaults.

**Highlights:** Survive endless enemy waves, Choose powerful run upgrades, Unlock permanent upgrades, Earn rewards and improve defenses, Deep strategy with simple controls, Fast-paced gameplay, Switch between auto-fire and click-to-fire

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GRIDFALL free?

GRIDFALL costs $3.99, and also offers in-app purchases.

### Is Ocean Defense TD free?

Ocean Defense TD is free to download, with no in-app purchases.

### Do GRIDFALL or Ocean Defense TD have ads?

Ocean Defense TD shows ads; GRIDFALL does not.

### Which is updated more often, GRIDFALL or Ocean Defense TD?

GRIDFALL ships an update every 4 months, and Ocean Defense TD daily. Most recently, GRIDFALL was updated on October 25, 2026 and Ocean Defense TD on October 10, 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.*