Comparison

E vs RCA Certificate

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

Head to head
About

E

Learn jazz guitar with practical, step-by-step lessons covering chords, progressions, and substitutions. This course is designed for intermediate players looking to understand jazz concepts without overwhelming theory.

Highlights
  • Step-by-step jazz guitar lessons
  • Covers chords and progressions
  • Includes theory, tips, tabs, and video
  • Explains chord embellishments and substitutions
  • Learn to create own jazz chord progressions
  • Lessons inspired by jazz standards
Features
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Discovering Jazz Guitar A practical introduction to jazz guitar — without getting lost in theory (or in your own fingers). Understand jazz chords and progressions with step-by-step lessons inspired by jazz standards, from Classic Jazz to Brazilian and Gypsy Jazz. This course is designed for beginners in jazz: you’ll learn real concepts and how to use them. It’s not a “first guitar” course though — you should already be comfortable with basic chords and basic rhythm (changing chords in time). What’s inside: 8 lessons with a gradual increase in difficulty. For each lesson: theory, tips, tabs, and video. Learn chord embellishments, diatonic substitution, and tritone substitution. Understand how to create your own jazz chord progressions. Lesson 1 — Jazz Chords Jazz chords built from the major scale. II–V–I chord changes in G and C. Introduction to walking bass. Lesson 2 — II–V–I Progression Using the major scale in progressions. Chord embellishment. The diminished chord. Lesson 3 — Changing Key Find II–V–I in multiple keys. Chord roots on the E and A strings. Lesson 4 — More Chord Movement Diatonic substitution. Secondary dominants. Cycle of fifths. Triads and tetrads. Lesson 5 — Tritone Substitution Tritone substitution in context. 11th and 13th chords. Practical fingerings. Lesson 6 — Blues for Clara From a traditional 12-bar blues to a richer form. 9th and 13th chords. Lesson 7 — Gypsy Swing Gypsy Jazz rhythm fundamentals. Major and minor 6th chords. Lesson 8 — Sunny Bossa Bossa Nova rhythm pattern. Using substitutions to color progressions.

About

RCA Certificate

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The ANSI-accredited Responsible Cannabis Agent certificate program is based on Foundation of Cannabis Unified Standards (FOCUS) published health and safety standards. This certificate program trains new employee-candidates and existing workers in Good Management Practice (GMP) programs and the employee roles in successful cultivation, manufacturing, retail/dispensary, and laboratory facilities of the cannabis industry. This certificate program guides you to these training objectives. o Expertise with FOCUS industry standards o Knowledge of a Quality Management System (QMS) and key operational programs o Basic awareness of the federal, state, and local laws that support cannabis-facility licensing o Readiness to act in an operational role, as directed by cannabis facility management o Competency with cannabis plants, compounds, products, and use The Responsible Cannabis Agent program builds your expertise with key Quality Management System (QMS) programs. o Training o Health & Safety o Hazard Control o Facility Maintenance o Tracking & Recall o Package & Labeling o Transportation o Security o Receiving o Storage o Customer & Patient Controls You’ll be ready to act in key roles, at the direction of your management team. o Trainer o Health and safety coordinator o First-aid provider (if you have additional training) o Hazard control coordinator o Recall coordinator o Transport team member o Security team member o Dispensary employee or vendor (also known as budtender) The course content has five levels 1. Cannabis Industry and FOCUS Quality Management System (QMS) Standards 2. Cannabis Plants, Products, and Effects on the Human Body 3. Employee Roles in Key QMS Programs 4. Cannabis Industry Laws and Compliance 5. Safe Product Handling Here is what you do to complete the Certificate Program. • Have access to an iPhone or iPad. • Know how to use the browser or mobile device (iPhone or other) to access the Responsible Cannabis Agent certificate program. • Valid personal identification to include name, mailing address, email address, and phone number. This information will be required for online proctoring. • Payment of the program license fee. Payment is made within the certificate program app after you evaluate and confirm the certificate app features. • A 'seat time' of approximately five to ten hours to learn, quiz, and complete the examination which evaluates your training outcome.

Screenshots

E4 screens
RCA Certificate4 screens

Verdict

The call

The clearest difference is in-app purchases: RCA Certificate at none against E's 1. RCA Certificate also leads on iOS requirement (13.0 vs 17.6). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. E sells 1 one-off in-app purchase. RCA Certificate asks for nothing beyond the download.

UpkeepUpdate frequency

E ships an update every 3 months, RCA Certificate every 5 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 6 level
E versus RCA Certificate: the parameters behind the verdict, then further details
ParameterERCA Certificate
PriceFreeFree
Positive reviews57.1% of reviews—
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size203 MB31 MB
Age rating4+4+
DeveloperDavid PalmerioCogneti, LLC

In-app purchases

1 purchases

E

One-time1
  • Full Access$3.99
None

RCA Certificate

No in-app purchases

Questions

Is E free?
E is free to download, with in-app purchases available.
Is RCA Certificate free?
RCA Certificate is free to download, with no in-app purchases.
Do E or RCA Certificate have ads?
Neither E nor RCA Certificate shows ads.
Which is updated more often, E or RCA Certificate?
E ships an update every 3 months, and RCA Certificate every 5 months. Most recently, E was updated on November 1, 2026 and RCA Certificate on November 3, 2026.

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