# FPVSIM vs Chess Opening Tactics Trainer

The clearest difference is price: Chess Opening Tactics Trainer at Free against FPVSIM's $9.99. Chess Opening Tactics Trainer also leads on update cadence (every 2 months vs every 4 months). FPVSIM's advantage is in-app purchases (none vs 7) and ads (none vs shown).

Chess Opening Tactics Trainer is free to download; FPVSIM costs $9.99 up front. Chess Opening Tactics Trainer sells 7 in-app purchases, starting at $2.99 per month. FPVSIM asks for nothing beyond the download.

FPVSIM ships an update every 4 months, Chess Opening Tactics Trainer every 2 months. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | FPVSIM | Chess Opening Tactics Trainer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 73 MB | 146 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jiahao Wang](https://appshunter.io/developer/1755770926) | [Dawid Wrzesinski](https://appshunter.io/developer/1812701337) |

## What reviewers say

### FPVSIM

[App page](https://appshunter.io/ios/app/fpvsim-timer/id6514321806)

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

**In-app purchases:** none


### Chess Opening Tactics Trainer

[App page](https://appshunter.io/ios/app/chess-opening-tactics-trainer/id6748003312)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Espresso Subscription | $2.99 | per month |
| Flat White Subscription | $5.99 | per 3 months |
| Latte Subscription | $7.99 | per 6 months |
| Super Large Subscription | $12.99 | per year |
| Espresso | $3.99 | one-time |
| Flat White | $6.99 | one-time |
| Latte | $9.99 | one-time |


## Frequently asked questions

### Is FPVSIM free?

FPVSIM costs $9.99, with no in-app purchases.

### Is Chess Opening Tactics Trainer free?

Chess Opening Tactics Trainer is free to download, with in-app purchases available.

### Do FPVSIM or Chess Opening Tactics Trainer have ads?

Chess Opening Tactics Trainer shows ads; FPVSIM does not.

### Which is updated more often, FPVSIM or Chess Opening Tactics Trainer?

FPVSIM ships an update every 4 months, and Chess Opening Tactics Trainer every 2 months. Most recently, FPVSIM was updated on October 7, 2026 and Chess Opening Tactics Trainer on October 17, 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.*