SAFE Toolkit vs Props & Governors
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SAFE Toolkit
This app offers essential news and resources for Certified Flight Instructors (CFIs), including endorsement details, experience requirements, and test codes. It also provides flight test applicants with insights from Designated Pilot Examiners and features a weekly blog and industry news notifications for all pilots.
- CFI endorsements, experience requirements, test codes
- Flight test insights from DPEs
- Weekly SAFE blog
- Industry news push notifications
- Pilot resources
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SAFE Toolkit provides "go-to" news and resources for CFIs: (endorsements, experience requirements, and test codes), but also "Checkride Ready™ for flight test applicants (the inside story from DPEs). Pilots enjoy the SAFE blog every week and push notifications of industry news. Download and stay up to date; "We are here to help! ALl we "sell" is safety!"
Props & Governors
Explore interactive diagrams and detailed explanations of single and multi-engine aircraft propeller and governor systems. Learn about manifold pressure, governor components like flyweights and pilot valves, and propeller parts such as counterweights and feathering pins.
- Interactive training diagrams
- Complete systems presentation
- Single and multi-engine aircraft coverage
- Detailed text descriptions
- Manifold pressure explanation
- Propeller and governor component breakdown
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Props & Governors offers an interactive and complete systems presentation on piston aircraft single-engine and multi-engine constant speed propellers and governors. The course is divided into illustrated and text descriptions of each system, accompanied by interactive training diagrams including a fully functioning Propeller/Governor system for both single and multi-engine aircraft. Topics covered include: Manifold Pressure and how it is affected Propeller governor components (Flyweights, Speeder Spring, Pilot Valve) Propeller components (Counterweights, Feather Spring, Feathering Pins)
Screenshots
Verdict
The clearest difference is review sentiment: Props & Governors at 100% against SAFE Toolkit's 38%. Props & Governors also leads on rating (5.0 vs 4.2) and ads (none vs shown). SAFE Toolkit's advantage is price (Free vs $5.99) and ratings volume (19 vs 2). On 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
SAFE Toolkit is free to download; Props & Governors costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Props & Governors holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: SAFE Toolkit has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 38% of SAFE Toolkit's written reviews are positive against 100% of Props & Governors's.
SAFE Toolkit ships an update every 7 months, Props & Governors every 3 months. Both last shipped on November 1, 2026.
| Parameter | SAFE Toolkit | Props & Governors |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 4.2 (19 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 37.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 19 — better | 2 |
| Update frequency | Every 7 months | Every 3 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 11.0 | 7.0 — better |
| Further details — not scored | ||
| Size | 33 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | David St. George | Aircraft Training Aids, LLC |
Customer experience
SAFE Toolkit
Props & Governors
In-app purchases
SAFE Toolkit
No in-app purchases
Props & Governors
No in-app purchases
Questions
Is SAFE Toolkit free?
Is Props & Governors free?
Which has better reviews, SAFE Toolkit or Props & Governors?
Do SAFE Toolkit or Props & Governors have ads?
Which is updated more often, SAFE Toolkit or Props & Governors?
Other comparisons
