TST FLY vs ESigner.App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TST FLY
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抛开传统遥控器,通过手机app操控蓝牙四轴app,给人一种不一样的体验。
ESigner.App
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"Easily edit, sign, and complete PDF documents with our intuitive application. Whether you’re filling out forms, reviewing contracts, or adding your signature to important papers, this app makes managing PDFs fast, simple, and professional—right from your device. Key Features: Fillable Forms – Type directly into forms, check boxes, and input fields with ease. Digital Signatures – Add your handwritten or saved signature in seconds. Markup Tools – Highlight, annotate, or draw on PDFs for notes and comments. Import from Anywhere – Open PDFs from email, cloud storage, or your device. Save & Share – Export signed or completed PDFs via email or cloud platforms. Secure & Private – All edits are made locally to keep your files safe. Perfect For: Signing contracts, agreements, or business documents Completing applications and official forms Annotating PDFs for review or collaboration Working remotely or on the go Subscription Information: Unlock full access with a subscription, including unlimited document editing and signing, custom signature styles, an ad-free workspace, and priority access to new features. Subscriptions are flexible and can be managed or canceled anytime through your account settings. Privacy - https://docs.google.com/document/d/19K7Arm8J7ldIeWxtYii9BBB7PzAKrt7d3bFsrRH8YHs/edit?usp=sharing Terms -https://docs.google.com/document/d/11d8SlCjANyV46d7Pv59X45E2yOKwxRFZHjG175dqpis/edit?usp=sharing"
Screenshots
Verdict
The clearest difference is in-app purchases: TST FLY at none against ESigner.App's 2. TST FLY also leads on update cadence (every 3 days vs weekly) and iOS requirement (9.0 vs 16). On price, 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. ESigner.App sells 2 in-app purchases, starting at $4.99 per 7 days. TST FLY asks for nothing beyond the download.
TST FLY ships an update every 3 days, ESigner.App weekly. The most recent releases landed on September 27, 2026 and October 15, 2026 respectively.
| Parameter | TST FLY | ESigner.App |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 16 |
| Further details — not scored | ||
| Size | 4 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | SHENZHEN TOUCHSTONE TECHNOLOGY CO.,LTD | Thomas Clark |
In-app purchases
TST FLY
No in-app purchases
ESigner.App
- Full Access$4.997 Days
- Sign Smarter, Work Faster3 Days trial$4.997 Days








