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Will Windows Phone 7/7.5 apps work on Windows Phone 8?

Posted: , by Maxwell R.

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Will Windows Phone 7/7.5 apps work on Windows Phone 8?

Since Microsoft has not released the Windows Phone 8 SDK to all developers yet, it is reasonable to assume that there will be a relatively small number of native Windows Phone 8 apps to be available once the OS makes its launch.  Such a reality is not uncommon with any operating system.  Microsoft promised that Windows Phone 8 would allow any Windows Phone 7.5 app to run without modification. 


What may pose a problem is how the language coming from Microsoft is not sounding so confident.  Some were openly wondering if the delay of rolling out the SDK to everyone might be related to keeping some features locked down until closer to the official announcement.  What may be more likely however, is that there is a backward compatibility problem.  Windows Phone 8 is a clean OS break from its predecessor.


Here is the initial promise from Microsoft earlier this year:
"With regard to existing applications: today’s Windows Phone applications and games will run on the next major version of Windows Phone. Driving application compatibility is a function of Microsoft’s commitment to its developers. Regardless of what we release in terms of new developer features and functionality, we have made a large investment in protecting your existing investments."

In a September 12 blog post by Andrew Whitechapel with the Windows Phone Developer Blog raises the issue of compatibility in his first bullet point:

"Even though almost everything is different, our app platform maintains a high degree of backward compatibility. So, from the perspective of the platform APIs, you generally don’t have to do anything – your app should just continue to work, without any changes. Where this becomes a little less cut-and-dried is if you’re doing anything unusual or unsupported in your app..."


Now let us couple the blog post with what was said in a September 17 podcast, Windows Phone Product Manager, Cliff Simpkins is quoted as saying:

WP8 was designed to run all WP7 Apps…and where we saw that Apps that were designed for 7 could use some tweaking, whether there was performance [issues] or you know [starts to say compatibility then moves to] App and binary code compatibility might go a little bit wonky in some cases – but you get that with any release

 

Where does that leave us?  For many of the developers it leaves them still waiting on Microsoft to release the SDK. For the users and customers, it means that we should take note of how legacy apps perform on the Windows Phone 8 devices when they become available.

 

Assuming this is the real issue, the question of “why” remains unanswered.  Or, this could be the grand Microsoft plan to keep us all in suspense until everything is announced.

 

sources: WPDownUnder, LiveSide.net and TheWindows Blog

20 Comments
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posted on 27 Sep 2012, 21:40 3

1. Pings (Posts: 297; Member since: 19 Dec 2008)


WP8 is the next Zune HD. A flop...

posted on 28 Sep 2012, 00:25 3

10. ChiX017 (Posts: 308; Member since: 09 Nov 2011)


Lol...your soo miss informed, like Developers would develop for the world's largest operating system on the Personal Computer & won't develop for it's Little brother (WP8) which would only increase their revenue and app functionality. Ask yourself this, does it make sense?

posted on 28 Sep 2012, 18:35

17. Pings (Posts: 297; Member since: 19 Dec 2008)


I am "misinformed"? No I think you are. What stopped them from developing for WP7? Largest operating system on the Personal Computer? Are you talking about Windows XP, or Windows 7? You are 100% not talking about Window 8. Windows 8 is a cheap rip off of AOL 1996. It will flop along with WP8. Developing for WP8 and Windows 8 will be similar, not XP, VISTA, or 7. I don't think you know what you are talking about. Again lets talk "Largest". Is a smartphone not a PC? Android has about 1.2 million activations a day. By 2013 there will be more Android devices then PC's. That's huge! PC sales are dying and Windows 8 will be the death of PCs. When they need help the most they are coming out with the crap that is Windows 8. Not thank you. I will be sticking with my Nexus and Windows 7.

posted on 29 Sep 2012, 12:44

19. ChiX017 (Posts: 308; Member since: 09 Nov 2011)


so your saying Android will replace personal Computers? *Ask yourself this, does it make sense?* A computer and a smartphone perform different functions, they DO NOT COMPETE. And i meant Windows 8 and it's apps store not previous windows OS

posted on 01 Oct 2012, 10:17

20. ChiX017 (Posts: 308; Member since: 09 Nov 2011)


http://www.wpcentral.com/survey-windows-phone-developers-shows-high-interest-cross-platform-development
You could check out this link for interested developers

posted on 28 Sep 2012, 02:44 1

14. sbr999 (Posts: 79; Member since: 05 Jun 2012)


Why are your thumbs so red? =) People like WP8, why do you think it will be a flop? It's fast, smooth, stable, no random restarts. I can't wait to get either Lumia 920 or the Ativ S, and I'm not the only one.

posted on 28 Sep 2012, 04:11

16. denied911 (banned) (Posts: 361; Member since: 31 May 2012)


no random restarts? funny thing that i read review of lumia 710 and guy said that he had couple of times random restarts.
just nice,
but about random restarts, in android it is bad app fault
get tunewiki, play internet radio on 3g, then turn off connectivity in android without turning off music, and you have random restart. BAD APPS!

posted on 27 Sep 2012, 21:41 2

2. Luuthian (Posts: 201; Member since: 09 Sep 2011)


Ugh... Part of why I divorced myself from WP7 was because of the severe lack regarding applications. I LOVED the operating system and Xbox connectivity, but I basically owned a glorified texting machine with a web browser. There were just no good apps for it, and the way you organized apps sucked.

The OS is looking a lot better, but if WP8 launches and they have a severe lack of apps a second time? I have zero faith in the platform. I was eyeballing that purple HTC 8X pretty hard, but now I think I'll just wait for a new Nexus.

posted on 28 Sep 2012, 00:28

11. ChiX017 (Posts: 308; Member since: 09 Nov 2011)


Well from the quotes in the article it will clearly have backward compatibility, and there are always BUTS, just don't let Apple 'but' be the exception(iOS6 Map/Siri glorification).

posted on 27 Sep 2012, 21:46

3. Danre (Posts: 85; Member since: 02 Sep 2012)


It was all confusing .....

posted on 27 Sep 2012, 21:47 1

4. Nadr1212 (Posts: 741; Member since: 22 Sep 2012)


The apps from WP 7 AND other 7s ( pWP 7.5, 7.8, etc.) work on WP 8, or ELSE....

posted on 27 Sep 2012, 21:50 1

5. gwhyte01 (Posts: 44; Member since: 09 Jul 2008)


Why is this even a question. Belfiore already they would. Start listening anfld stop questioning what they already stated was a fact.

posted on 27 Sep 2012, 22:04 1

6. pikapowerize (banned) (Posts: 1869; Member since: 03 May 2012)


it should be! coz that 100,000 apps of WP7/7.5 will be worthless!

i thought microsoft already said that WP7 apps will work on WP8 but WP8 apps wont work on WP7!

posted on 27 Sep 2012, 22:14 3

7. pikapowerize (banned) (Posts: 1869; Member since: 03 May 2012)


oh my god.. edit this!

i haven't read the news yet...but now i did...

microsoft might be scrambling trying to figure out how to make WP7 apps useful to WP8!

the 100,000+apps will be worthless if they wont figure this one out!

unlike BlackBerry... out of its 100,000 apps, most of them are for BB7 then few but counting are for Playbook/BB10 but its a reasonable jump by RIM from java to QNX!

but the jump of microsoft from WInMo, to WP7 to WP8 is somehow not acceptable.. apps of WimMo wont work on WP7.. so i really wish that WP7 apps will work on WP8 or else its gonna be a big problem again for microsoft and nokia too!!! so nokia, you better work with Microsoft side by side coz you know what is better!

posted on 27 Sep 2012, 22:27 3

8. StephenElop (banned) (Posts: 14; Member since: 27 Sep 2012)


Doubt so, its just a rumor..
I have the WP8 SDK myself and my current 7.5 app works fine when deployed

posted on 27 Sep 2012, 23:16 1

9. eisenbricher (Posts: 970; Member since: 09 Aug 2012)


That's nice! Really :)

posted on 28 Sep 2012, 00:45 1

12. oying24 (Posts: 48; Member since: 26 Sep 2012)


happy to hear that.. nice.. :)

posted on 28 Sep 2012, 00:56 2

13. askbingask (Posts: 22; Member since: 31 Jul 2012)


what r u doing here elop u should be in office lolz.

posted on 28 Sep 2012, 03:00 3

15. Mittal (Posts: 427; Member since: 14 Dec 2011)


u mean at Microsoft ?? :P

posted on 28 Sep 2012, 19:35

18. 7thspaceman (Posts: 1017; Member since: 14 Feb 2011)


I was watching the video on the windows phone 8 developers conferance and one of the main men behind windows Phone 8 development said that window 7 smart phone apps will run on windows 8 smart phones and indicated that Microsoft itself would do work to make it so .Do not take my word for it look at the video yourself. I do not think developers would be told a lie if it were not so. when I heard the main main of Windows phone 8 say that I said to myself Microsoft is going to have a lot of work to do because windows phone 7,5-7,8 has a least 100000 apps at this point he also encouraged them to write more apps for Windows 7 series smart phones and they would work on windows phone 8. Read between the Lines folks Windows 7 series smart phones are not dead because i heard the main man tell developers to continue to write apps for it in fact I think Nokia is behind this. Nokia just launched the Nokia 510 and it runs Windows 7.8 and is Nokia's new low end smart phone look for Microsoft to announce windows 7.8 to run Nokia new low cost smart phones.

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