Comparison

Double Bass Tuner vs FlexTunerPro

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

Head to head
About

Double Bass Tuner

This free mobile application helps you quickly tune your double bass with professional-quality sounds. It offers auto, manual, and chromatic tuning modes, working offline for convenience. Customize settings like concert pitch and frequency filters for precise tuning.

Highlights
  • Offline tuning
  • Auto tune mode
  • Manual tune mode
  • Chromatic tuner mode
  • Customizable concert pitch (Hz)
  • Frequency deviation in cents
  • Instrument head view
Features
Read full description

Double Bass Tuner – XTuner PRO is an easy-to-use free mobile application with which you will be able to tune your double bass quickly. The sounds for our application were recorded by professional musicians. Sounds that cannot be generated by a musician have been created synthetically. App works offline. What is the most important: it is a free tuner. The algorithm in the double bass tuner offline app has been prepared for the most effective recognition of instrument sounds. To get the auto tune result, play the sound several times. Double Bass Tuner – XTuner PRO app for instruments has three modes: auto tune, manual and pro - chromatic tuner mode. App works offline. - Auto Tune – automatic tuning – examined the frequency of the signal is interpreted to the next clear sound of the specific frequencies of pure sound. - Manual – sound tuning - select a specific sound that will be tuned. Features in the tuning app: - the ability to set the frequency of sound "a" (concert pitch) in Hz (herz), - the ability to determine the deviation from the base frequency in cents, - instrument head view, - ability to set frequency filter - custom tuning - presets for your music instrument - chromatic tuner mode – you can practise diapason using it - auto tune and manual mode - professional frequency settings – choose the concert pitch in Hz and transposition - double bass tuner offline - it is a free pro tuner; you don’t have to pay. If you would like to have version of the free tuner with no ads, you can buy premium forever or subscription. If you will have any problems with Double Bass Tuner – XTuner PRO app, please feel free to contact us: mobile@netigen.eu. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://netigen.eu/privacy/ More information: https://xtunerpro.com/doublebass

About

FlexTunerPro

Features
Read full description

Key Features ◆ 3 Tuning Modes • Tuner(Auto): Automatically detects and tunes played strings • Tuner(Manual): Select specific strings for precise tuning • Practice: Ear training mode with reference tones ◆ Instrument Profiles • 6-String Guitar (Standard tuning) • 7-String Guitar• 4-String Bass • 5-String Bass • Ukulele (Soprano) • Contrabass and other Strings Instruments • Create custom profiles ◆ Customization • A4 reference pitch adjustment (430-450Hz) • Individual string frequency settings • Supports tuning for situations such as when using a guitar capo through overall pitch adjustment • Profile export/import • Guide tone waveform can be changed from Profile Edit. Available waveforms: Sawtooth, Square, Triangle, and Original (easier to hear in low frequency ranges) ◆ User-Friendly • Large, clear tuning meter • Precise cent display • Auto-lock prevention during tuning • Japanese/English support ※ Important Note Due to the harmonics produced by musical instruments, the octave of the detected pitch may sometimes be incorrectly identified. Please note that there is currently no available method to improve this misdetection issue. 30-Day Free Trial Try all features free for 30 days. Premium Version After the trial period, a one-time purchase is required to continue using the app. Once purchased, enjoy all features forever.

Screenshots

Double Bass Tuner4 screens
FlexTunerPro4 screens

Verdict

The call

The clearest difference is ads: FlexTunerPro at none against Double Bass Tuner's shown. Double Bass Tuner's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 18.5). On price, update cadence and in-app purchases 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. Double Bass Tuner sells 2 in-app purchases, starting at $2.99 per 7 days and FlexTunerPro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 21, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 6 level
Double Bass Tuner versus FlexTunerPro: the parameters behind the verdict, then further details
ParameterDouble Bass TunerFlexTunerPro
PriceFreeFree
Rating3.3 (6 ratings) — better—
Number of ratings6 — better—
Update frequencyEvery 2 monthsEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better18.5
Further details — not scored
Size54 MB3 MB
Age rating4+4+
DeveloperNETIGEN Kluzowicz sp. j.SATOSHI NAGASAKA

In-app purchases

2 purchases

Double Bass Tuner

Subscriptions1
  • 1 week subscription + trial3 Days trial$2.997 Days
One-time1
  • Forever one-time payment$19.99
1 purchases

FlexTunerPro

One-time1
  • Premium$2.99

Questions

Is Double Bass Tuner free?
Double Bass Tuner is free to download, with in-app purchases available.
Is FlexTunerPro free?
FlexTunerPro is free to download, with in-app purchases available.
Do Double Bass Tuner or FlexTunerPro have ads?
Double Bass Tuner shows ads; FlexTunerPro does not.
Which is updated more often, Double Bass Tuner or FlexTunerPro?
Double Bass Tuner ships an update every 2 months, and FlexTunerPro every 2 months. Most recently, Double Bass Tuner was updated on October 21, 2026 and FlexTunerPro on October 30, 2026.

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