Comparison

Let's Sync vs BoltBox

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Let's Sync

Synchronize audio across multiple smartphones for shared listening experiences. Create events for silent dances, interactive stories, group workouts, and more. It's a versatile platform for personal and business use, supporting thousands of concurrent participants.

Highlights
  • Synchronizes audio across multiple smartphones
  • Creates shared listening events
  • Supports silent dances and interactive stories
  • Enables group workouts and worldwide events
  • Platform for unique business ventures
  • Supports up to 7,000 concurrent participants
Features
Read full description

Let’s Sync synchronizes audio across multiple smartphones. It is used to create events in which multiple participants hear the audio from their phones at the same time. Let's Sync creates the following types of events Silent Dances in Nature Story Foolery Interactive Stories Story Dating Events Story Gatherings Interactive Story Telling Toys Multilevel Yoga Classes Worldwide Events Sync your favourite playlist with your friends while running, biking and skiing. Let's Sync has many uses and is only limited to your imagination. What will you create? Let’s Sync is free to use and can support up to 7,000 concurrent participants, more with advanced notices. Let’s Sync synchronizes audio across smartphones. It works anywhere where there is internet connection. Let’s Sync can be a platform for your own unique business. Lead your own ecstatic dance events in nature, raise money for your favorite causes, teach simultaneous multi-level yoga classes, or create content for others to use and get paid every time they do. What will you create?

About

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.

Highlights
  • Calculation & Conversion Tools
  • Text Editing & Analysis
  • QR Code Generation & Scanning
  • Audio Recording & Text-to-Speech
  • Password & Random Number Generation
  • Pomodoro Timer & White Noise
Features
Read full description

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/

Screenshots

Let's Sync4 screens
BoltBox4 screens

Verdict

The call

The clearest difference is ads: Let's Sync at none against BoltBox's shown. Let's Sync also leads on iOS requirement (13.0 vs 17.0). BoltBox's advantage is review sentiment (100% vs 67%). On price, update cadence, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Let's Sync sells 10 one-off in-app purchases and BoltBox sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
Let's Sync versus BoltBox: the parameters behind the verdict, then further details
ParameterLet's SyncBoltBox
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings—4 — better
Update frequencyMonthlyMonthly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size92 MB36 MB
Age rating12+4+
DeveloperTerra Virgo CorporationSenol Cagir

Customer experience

Let's Sync

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

BoltBox

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

Let's Sync

One-time10
  • Add 5 credits to wallet$4.99
  • Add 21 credits to wallet$20.99
  • Add 22 credits to wallet$21.99
Show 7 more
  • Add 23 credits to wallet$22.99
  • Add 24 credits to wallet$23.99
  • Add 25 credits to wallet$24.99
  • Add 26 credits to wallet$25.99
  • Add 27 credits to wallet$26.99
  • Add 28 credits to wallet$27.99
  • Add 29 credits to wallet$28.99
2 purchases

BoltBox

Subscriptions2
  • Monthly$2.991 Month
  • Annual$24.991 Year

Questions

Is Let's Sync free?
Let's Sync is free to download, with in-app purchases available.
Is BoltBox free?
BoltBox is free to download, with in-app purchases available.
Do Let's Sync or BoltBox have ads?
BoltBox shows ads; Let's Sync does not.
Which is updated more often, Let's Sync or BoltBox?
Let's Sync ships an update monthly, and BoltBox monthly. Most recently, Let's Sync was updated on October 10, 2026 and BoltBox on October 16, 2026.

Other comparisons