Greybox Tool vs Reverse Voice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Greybox Tool
A utility for developers to understand ad network operations. It allows manual triggering of postbacks and viewing device identifiers for debugging and attribution tracing. Developers can also inspect SKAdNetwork requests and postback content.
- Manual postback triggering
- View device identifiers (IDFA, IDFV)
- Inspect SKAdNetwork requests
- Share debugging information
- Analyze ad network processes
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Greybox Tool is a simple tool application for developers to know how ad network works. For ad network developers, you can: - Advertise this simple app in the delivery system, and trigger postback manually to see what happens during the advertising process step by step. - View and share the device identifiers for further debugging and attribution tracing. For app developers, you can: - View and share device details such as IDFA and IDFV. - See SKAN requests and postback content in different ad networks without developing a new application. - View and share the device identifiers with ad network tech supports for further debugging.
Reverse Voice
Transform audio by reversing it, adjusting playback speed and pitch, or applying AI voice styles. Flip images and explore creative audio-visual effects. Save and share your unique creations.
- Reverse audio recordings and imported files
- Adjust playback speed and pitch
- Apply AI voice styles
- Flip photos horizontally and vertically
- Save and share creations
- In-app history for saved audio
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Turn everyday sounds into something unexpected with Reverse Voice. Record a sound or import an audio file, then play it backward for fun, creative results. Adjust playback speed and pitch, trim your clip, and save or share your creations. FEATURES • Reverse audio recorded with your microphone or imported from Files • Trim clips and adjust playback speed, pitch, and looping • Transform recordings with AI voice styles • Flip photos horizontally, vertically, or both • Explore reverse-video inspiration and voice-style previews • Keep completed audio in your in-app history • Use the app in your preferred language AI Voice processing requires an internet connection. Reverse Audio, Image Flip, and AI Voice creation require an active auto-renewable subscription. A free trial may be available to eligible users. Voice Reverser Pro — weekly subscription Voice Reverser Pro unlocks everything in the app for one weekly price: unlimited voice and audio reversing with no length limit, unlimited AI Voice Cover conversions, full-quality image reversing, and watermark-free download, sharing and unlimited History saves. Length of subscription: 1 week. Price: 4.99$/week. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Privacy Policy: https://sites.google.com/view/voicereverserprivacypolicy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Reverse Voice at 4.3 against Greybox Tool's 2.5. Reverse Voice also leads on ratings volume (229 vs 2) and chart position (#182 vs unranked). Greybox Tool's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Reverse Voice sells 1 in-app purchase, starting at $4.99 per 7 days. Greybox Tool asks for nothing beyond the download.
Reverse Voice holds the better App Store score, 4.3 against 2.5. That said, the two scores are not equally well evidenced: Reverse Voice has 229 ratings behind it against 2, so its average is the more settled of the two.
Greybox Tool ships an update every 2 weeks, Reverse Voice fortnightly. The most recent releases landed on October 9, 2026 and October 25, 2026 respectively.
| Parameter | Greybox Tool | Reverse Voice |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) | 4.3 (229 ratings) — better |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | 2 | 229 — better |
| Update frequency | Every 2 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #182 — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 153 MB |
| Age rating | 17+ | 4+ |
| Developer | Yunfeng Wei | Duc Duong Tran |
Customer experience
Greybox Tool
Reverse Voice
In-app purchases
Greybox Tool
No in-app purchases
Reverse Voice
- Weekly Premium Subcription3 Days trial$4.997 Days
Questions
Is Greybox Tool free?
Is Reverse Voice free?
Which has better reviews, Greybox Tool or Reverse Voice?
Do Greybox Tool or Reverse Voice have ads?
Which is updated more often, Greybox Tool or Reverse Voice?
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