Bolt Torque vs Super Signer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bolt Torque
Calculate maximum tightening torque and preloads for various screws. Analyze preloads and stresses to ensure limits are met. All screw data is conveniently presented on a results page.
- Calculate tightening torque
- Calculate preloads
- Analyze stresses
- Check limits
- View screw data
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Take benefit from my engineering know how and calculate the max. tightening torque and preloads for many iso-metric and imperial screws. Calculate the preloads and stresses and check the limits. All screw data are listed on a result page. This app is a "must have" for all engineers in design departments.
Super Signer
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Super Signer is the simplest way to sign a document on your iPhone or iPad. Import a PDF or image, add your signature, and save locally — that’s it. No accounts. No logins. No cloud uploads. How it works Import a PDF or image from Files / Photos (or wherever your iOS share sheet supports). Draw your signature (or initials). Place it on the document and adjust size/position. Save to your device — stored locally. Why Super Signer Fast & minimal: open → sign → save Offline-friendly: works without an internet connection Privacy-first: no sign-in, no cloud storage Great for quick tasks: forms, receipts, agreements, school docs, approvals If you just need to sign something quickly and keep it on your phone, Super Signer is the one you’ll actually use.
Screenshots
Verdict
The clearest difference is price: Super Signer at $0.99 against Bolt Torque's $9.99. Super Signer also leads on iOS requirement (15.0 vs 18.6). Bolt Torque's advantage is update cadence (monthly vs every 2 months). On ads, in-app purchases 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
Bolt Torque costs $9.99 and Super Signer $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Bolt Torque ships an update monthly, Super Signer every 2 months. The most recent releases landed on September 6, 2026 and September 21, 2026 respectively.
| Parameter | Bolt Torque | Super Signer |
|---|---|---|
| Price | $9.99 | $0.99 — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 1 MB |
| Age rating | 4+ | 17+ |
| Developer | Jochen Autrata | Kareena Rogers |
In-app purchases
Bolt Torque
No in-app purchases
Super Signer
No in-app purchases
Questions
Is Bolt Torque free?
Is Super Signer free?
Do Bolt Torque or Super Signer have ads?
Which is updated more often, Bolt Torque or Super Signer?
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