Comparison

R2 Touch vs convertX

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

Head to head
About

R2 Touch

This app serves as a remote control for R2-D2 replica robots equipped with specific receiver boards. It allows users to control various droid functions like dome panels, holoprojectors, sounds, and lighting. Users can upload their own sound files for playback and customize button commands.

Highlights
  • Control dome panels, holoprojectors, sounds, and lighting
  • Upload custom sound files
  • Programmable ASCII string commands
  • WiFi and serial output options
  • Customizable buttons
  • R2-D2 inspired interface
Features
Read full description

This is a remote control app for members of the R2 Builders Club. Apart from looking pretty, and playing sounds (if you upload them to the application), it doesn't do anything unless you are building an R2-D2 replica robot and have MarcDuino receiver boards (as described in www.marcduino.com and on my build log on Astromech.net). If you do, lucky you, it will allow you to control the dome panels, holoprojectors, sounds and dome lighting of your Droid in all sorts of interesting ways. You can see a demo of how it works with my R2 here: http://www.youtube.com/watch?v=AUod3LRQ1DI The app can run all the way down to iOS 8 on an iPhone 4S. The app doesn't include any sounds by default. If you want sounds to play directly from the app or through Bluetooth, you must upload your own sounds files to the App using iTunes. The sound files are typically the exact same you'd use in your remote sound system of the robot such as my MP3Trigger setup (described on www.marcduino.com). Commands, in the form of programmable short ASCII strings, are sent via the internal WiFi iPhone radio to a remote WiFly receiver. Alternately, the app also generates a 9600 baud serial output stream on the earphone audio port. This way you can send serial command to an external XBee transmitter radio for a more reliable link. You'll need a small level adapter board to use the audio serial capability, also on www.curiousmarc.com. Since you can customize most buttons and commands, you could also use this as a generic remote control app to send any short serial string via WiFi (to a WiFly radio fore example) or serial link (through an XBee). And with a spiffy R2-D2 inspired interface to boot!

About

convertX

Features
Read full description

ConvertX gives engineers, students, and everyday users the most complete unit converter in their pocket. 44 categories. 400+ units. Offline. EVERYDAY — FREE FOREVER Length · Weight · Temperature · Area · Volume · Speed · Time Data Storage · Pressure · Energy · Power · Angle · Fuel · Frequency LIVE CURRENCY 30 currencies updated in real-time. Works offline with cached rates. No account. No sign-up. Just convert. ENGINEERING SUITE — PRO The only converter with a complete professional engineering toolkit: Mechanical: Force · Torque · Stress · Density · Dynamic Viscosity Kinematic Viscosity · Acceleration · Angular Velocity Civil: Flow Rate · Stress Intensity · Illuminance · Concentration Water Hardness Electrical: Voltage · Resistance · Capacitance · Inductance Current Density Thermal / HVAC: Thermal Conductivity · Heat Flux · Cooling Load Specific Heat Science: Radiation Dose · Radioactivity · Molar Amount Acoustics: Sound Level · Luminous Intensity Material Science: Hardness (HRC / HV / HB / Shore) · Elastic Modulus DESIGNED FOR REAL USE • 48-point bold numbers — your result fills the screen • Dark neon UI — no eye strain in the field or lab • Tap any unit row to set it as your conversion target • Swap units with one tap — no fumbling • Copy result to clipboard instantly • Favorites — pin your most-used converters to the top • History — last 50 conversions saved automatically • 100% offline — no internet needed for any unit conversion PRIVACY FIRST No account. No tracking. No personal data collected. PRO — $4.99 ONCE, YOURS FOREVER Unlock all 29 engineering categories with a single one-time purchase. No subscription. No monthly fee. Lifetime access including all future engineering categories added to the app. ConvertX is the converter engineers reach for on-site, students use in the lab, and travellers rely on for currency — all in one place.

Screenshots

R2 Touch4 screens
convertX4 screens

Verdict

The call

The clearest difference is price: convertX at Free against R2 Touch's $5.99. R2 Touch's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

CostPrice · In-app purchases · Ads · Monetization

convertX is free to download; R2 Touch costs $5.99 up front. convertX sells 1 one-off in-app purchase. R2 Touch asks for nothing beyond the download.

Scorecard4 real differences · 6 level
R2 Touch versus convertX: the parameters behind the verdict, then further details
ParameterR2 TouchconvertX
Price$5.99Free — better
Rating4.8 (9 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 10 months—
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size4 MB32 MB
Age rating4+17+
DeveloperNeil HutchisonDhaval Panasara

In-app purchases

None

R2 Touch

No in-app purchases

1 purchases

convertX

One-time1
  • LifeTime Premium$4.99

Questions

Is R2 Touch free?
R2 Touch costs $5.99, with no in-app purchases.
Is convertX free?
convertX is free to download, with in-app purchases available.
Do R2 Touch or convertX have ads?
convertX shows ads; R2 Touch does not.

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