Often users ask about the differences between the free and pro versions of iSpring — and while iSpring Solutions does have extensive documentation on the differences, I thought it will be nice to have that information available on the FlashPPT site.
Nina Lezhnina from iSpring sent me an exhaustive comparison.
| Features | Free | Pro |
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| PowerPoint and operating system compliance | ||
| PowerPoint 2000/2002/2003/2007 | + | + |
| Windows 2000/XP/2003/Vista | + | + |
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| PowerPoint Objects Support | ||
| Grouped shapes, texts, images, vector shapes | + | + |
| Diagrams, Charts and Graphs | + | + |
| 3D objects and effects | + | + |
| Slide Masters (with animations and hyperlinks) | + | + |
| Internal and external hyperlinks | + | + |
| Conversion of large (200+ MB) presentations | + | + |
| Right-to-Left languages | + | + |
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| PowerPoint Multimedia | ||
| 185+ animation effects | + | + |
| All slide transition effects | + | + |
| Synchronization of animations and sounds | + | + |
| Mouse driven animations | + | + |
| Repeated animations | + | + |
| Embedded Flash files | + | + |
| Embedded audio | + | + |
| Embedded video files | + | + |
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| Presentation enhancements with iSpring | ||
| One click publishing | + | + |
| 6 integrated Players | – | + |
| Size and Scale customization | – | + |
| Flash movie Preloader | – | + |
| Full screen playback mode | – | + |
| Web links manager | – | + |
| Background audio for entire presentation | – | + |
| Background audio for separate slide | – | + |
| Looped playback | + | + |
| Flash menu disable | – | + |
| Flash presentation autostart | – | + |
| Mouse and keyboard playback control | – | + |
| References manager | – | + |
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| Flash based player | ||
| Integrated Flash based Player | + | + |
| Live Preview | – | + |
| Customizable Player skins | – | + |
| Presenter info | – | + |
| Custom interactive logo | – | + |
| “Banner” creation mode | – | + |
| Show/Hide Player Buttons, Noteses, Thumbnails, Titles | – | + |
| Ink annotation tool | – | + |
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| Possible destination | ||
| SlideBoom online portal | + | + |
| Local folder at My Computer | + | + |
| – | + | |
| Remote FTP server | – | + |
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| Output formats | ||
| Flash file (.SWF) | + | + |
| HTML page | + | + |
| Executable file (.EXE) | – | + |
| Archive (.ZIP) | – | + |
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| Flash movie packaging | ||
| Solid Flash movie | + | + |
| Separate Flash movies with Player | – | + |
| Standalone Flash movies without Player | – | + |
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| Quality and Compression Control | ||
| Smart compression for images | – | + |
| Preset and custom compression modes | – | + |
| Video bitrate control | – | + |
| Audio compression | – | + |
| Smoothing of raster images | – | + |
| Frame rate control | – | + |
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There are two more versions of iSpring: Ultra and SDK that add different or expanded abilities — this page on the iSpring site has more info about these abilities.

Thank! I had been creating flash movies with iSpring Free, and i was thinking, it's sufficient. But with features listed above my presentations may look as really professional movies. Great!