# Stable Stopwatch Plus vs Blackboard

The clearest difference is in-app purchases: Stable Stopwatch Plus at none against Blackboard's 1. Stable Stopwatch Plus also leads on ads (none vs shown) and iOS requirement (11.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Blackboard sells 1 one-off in-app purchase. Stable Stopwatch Plus asks for nothing beyond the download.

Stable Stopwatch Plus ships an update every 7 months, Blackboard every 4 months. The most recent releases landed on May 17, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Stable Stopwatch Plus | Blackboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (2 ratings)](https://appshunter.io/ios/app/blackboard-stopwatch/id1470227478/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 11 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Equine Data Inc.](https://appshunter.io/developer/898391064) | [Filippo Gozza](https://appshunter.io/developer/954580932) |

## What reviewers say

### Stable Stopwatch Plus

[App page](https://appshunter.io/ios/app/stable-stopwatch-plus/id955667394)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blackboard

[App page](https://appshunter.io/ios/app/blackboard-stopwatch/id1470227478)

A straightforward stopwatch app featuring oversized digits for easy visibility. It offers single-button control for starting, stopping, and resetting. With optional Bluetooth integration and a photocell, it can function as a race display, expanding its utility.

**Highlights:** Oversized digits, Single-button control (start, stop, reset), Bluetooth device integration, Photocell compatibility, External Bluetooth button support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | one-time |


## Frequently asked questions

### Is Stable Stopwatch Plus free?

Stable Stopwatch Plus is free to download, with no in-app purchases.

### Is Blackboard free?

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

### Do Stable Stopwatch Plus or Blackboard have ads?

Blackboard shows ads; Stable Stopwatch Plus does not.

### Which is updated more often, Stable Stopwatch Plus or Blackboard?

Stable Stopwatch Plus ships an update every 7 months, and Blackboard every 4 months. Most recently, Stable Stopwatch Plus was updated on May 17, 2026 and Blackboard on September 12, 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.*