BoltBox vs Ring Sizer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BoltBox
This utility app provides a comprehensive suite of tools for daily and professional tasks. It includes calculators, text editors, QR code functions, audio tools, and more, all within a user-friendly interface to enhance efficiency.
- Calculation & Conversion Tools
- Text Editing & Analysis
- QR Code Generation & Scanning
- Audio Recording & Text-to-Speech
- Password & Random Number Generation
- Pomodoro Timer & White Noise
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60+ everyday tools in one fast, simple app. Calculate, convert, scan, record and focus without hunting for a separate app for every small job. SCAN AND CREATE • QR code scanner and QR code generator • Document scanner and photos to PDF • Copy text from any photo (OCR) CALCULATE AND CONVERT • Tip, discount, percentage, VAT, loan, BMI and age calculators • Currency, length, weight, volume, temperature, data and power converters • Date calculator and shipping size calculator PHOTOS • Remove a photo background in seconds • Resize images, add a watermark, split a picture into a grid • Pick colors, build palettes and view photo metadata TEXT AND DEVELOPER TOOLS • Word counter, case converter, text cleaner, sorter and comparator • JSON formatter, regex tester, Base64, URL encoder, hash generator, Lorem Ipsum SOUND AND MEASURE • Voice recorder, text to speech, white noise and tone generator • Metronome, tap tempo and instrument tuner • Compass, decibel meter and frequency meter FOCUS AND TIME • Pomodoro focus timer with Live Activity on your Lock Screen and Dynamic Island • Stopwatch, world clock and habit tracker MADE TO BE QUICK • Mark favorites and open them from a Home Screen or Lock Screen widget • Siri and Shortcuts support for the tools you use most • Clean design, light and dark mode BoltBox is free to start. BoltBox Pro is an optional auto-renewing subscription that unlocks the premium tools. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ring Sizer
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Ring Sizer is a simple on-screen tool to find your ring size at home. Place a ring on the screen and resize the guide until it matches the inner edge, or measure your finger with the stencil and side slider. Ring Sizer also includes a real centimetre and inch ruler. Get clear US, UK, and EU sizes, save measurements on your device, and calibrate with a bank card for better accuracy. This app uses the standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Ring Sizer at none against BoltBox's 2. Ring Sizer also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). On price, update cadence 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. BoltBox sells 2 in-app purchases, starting at $2.99 per month. Ring Sizer asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | BoltBox | Ring Sizer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 37 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Senol Cagir | Yaroslav Trofimov |
In-app purchases
BoltBox
- Monthly$2.991 Month
- Annual$24.991 Year
Ring Sizer
No in-app purchases









