# BOLLbox vs Timegrapher

The clearest difference is in-app purchases: BOLLbox at none against Timegrapher's 1. BOLLbox also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.0). Timegrapher's advantage is update cadence (every 6 days vs every 7 months). On price and ads there is nothing between them.

Both are free to download. Timegrapher sells 1 one-off in-app purchase. BOLLbox asks for nothing beyond the download.

BOLLbox ships an update every 7 months, Timegrapher every 6 days. The most recent releases landed on September 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | BOLLbox | Timegrapher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6788081843/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 2 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BOLL & KIRCH Filterbau GmbH](https://appshunter.io/developer/1673939850) | [Fotios Avgidis](https://appshunter.io/developer/6787521132) |

## What reviewers say

### BOLLbox

[App page](https://appshunter.io/ios/app/bollbox/id6445814925)

**Features:** macOS Compatibility

**In-app purchases:** none


### Timegrapher

[App page](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6788081843)

This app uses your iPhone's microphone to analyze watch accuracy, measuring rate, amplitude, and beat error. It provides detailed insights into your watch collection's performance and value, all processed locally on your device.

**Highlights:** Measures rate, amplitude, and beat error, Analyzes beat rate from 18,000 to 36,000 bph, Tracks watch collection performance over time, Computes current market value from Chrono24, Provides plain-language verdicts on watch condition, Processes all data locally for privacy

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Timegrapher Pro | $9.99 | one-time |


## Frequently asked questions

### Is BOLLbox free?

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

### Is Timegrapher free?

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

### Do BOLLbox or Timegrapher have ads?

Neither BOLLbox nor Timegrapher shows ads.

### Which is updated more often, BOLLbox or Timegrapher?

BOLLbox ships an update every 7 months, and Timegrapher every 6 days. Most recently, BOLLbox was updated on September 8, 2026 and Timegrapher on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*