# Bolt Reader® vs TDI Flasher

The clearest difference is rating: Bolt Reader® at 5.0 against TDI Flasher's 3.0. Bolt Reader® also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 3 months). TDI Flasher's advantage is in-app purchases (none vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Bolt Reader® sells 1 one-off in-app purchase. TDI Flasher asks for nothing beyond the download.

Bolt Reader® holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

Bolt Reader® ships an update every 5 weeks, TDI Flasher every 3 months. The most recent releases landed on June 4, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Bolt Reader® | TDI Flasher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/bolt-reader/id1554066006/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/tdi-flasher/id6447965520/reviews) |
| Number of ratings | **6** | 2 |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 24 MB | 55 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Transmission Dynamics](https://appshunter.io/developer/1554066008) | [Mobile Flash Solutions Ltd](https://appshunter.io/developer/1683126213) |

## What reviewers say

### Bolt Reader®

[App page](https://appshunter.io/ios/app/bolt-reader/id1554066006)

This application provides users with real-time bolt tension data through intuitive bar graphs. It is specifically designed to work with Bolt-Cap Module devices from Transmission Dynamics, helping users quickly identify screws needing attention.

**Highlights:** Real-time bolt tension information, Bar graph data visualization, Identify screws requiring attention, Designed for Bolt-Cap Module devices, Works with Transmission Dynamics hardware

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $49.99 | one-time |


### TDI Flasher

[App page](https://appshunter.io/ios/app/tdi-flasher/id6447965520)

Remap your VAG TDI vehicle from home with this mobile tuning solution. Improve power and efficiency by flashing custom tunes. Requires a specific OBD adapter.

**Highlights:** Datalogging with BHP & Torque estimates, Read & Clear Trouble Codes, Remap/Flash vehicle with performance tunes, Check OBD Readiness Status

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

**In-app purchases:** none


## Frequently asked questions

### Is Bolt Reader® free?

Bolt Reader® is free to download, with in-app purchases available.

### Is TDI Flasher free?

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

### Which has better reviews, Bolt Reader® or TDI Flasher?

Bolt Reader® is rated higher. Bolt Reader® averages 5.0 out of 5 from 6 ratings, while TDI Flasher averages 3.0 from 2 ratings.

### Do Bolt Reader® or TDI Flasher have ads?

TDI Flasher shows ads; Bolt Reader® does not.

### Which is updated more often, Bolt Reader® or TDI Flasher?

Bolt Reader® ships an update every 5 weeks, and TDI Flasher every 3 months. Most recently, Bolt Reader® was updated on June 4, 2026 and TDI Flasher on September 8, 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.*